History Series / BigMouth2022

* LuxuryPrisonSuite: Gucheon Prison is your typical prison but this is the case for the wealthy VIP prisoners who pay the warden to get them the best room with entertainment services like a pool table and Whisky.

Enters Go Miho (played by Yona from Music/GirlsGeneration), Changho's loving and brave wife who works as a nurse. When her husband is accused of being the mysterious conman "Big Mouse" [[ClearTheirName she vows to clear up his name]] and support him no matter what with the help of her father (Go Gikwang, played by Lee Ki-Young) and Changho's best friend who's also a lawyer (played by Oh Eui-Sik).

Park Changho is a third-rate lawyer with a low success rate. He is known as "Big Mouth" between his peers and clients because he talks big but doesn't have the actions to back it up. One day, he gets tangled up in a murder case involving the upper class when Choi Doha, the mayor of Gucheon, asks him to take up the case. His life turns upside down as he's mistaken for a famous conman that goes under the name "Big Mouse" and gets sent to prison.

Enters Go Miho, Changho's loving and brave wife who works as a nurse. When her husband is accused of being the mysterious conman "Big Mouse" [[ClearTheirName she vows to clear up his name]] and support him no matter what with the help of her father (Go Gikwang) and Changho's best friend who's also a lawyer.

Will Miho succeeds in proving the innocence of her husband? What will be Changho's fate in jail and who's the real "Big Mouse"?

* EvilLaugh: Jihoon has one, especially when he [[spoiler:tortures Changho.]]

* FauxAffablyEvil: [[spoiler:Choi Doha]] turns out to be this. He pretends to be polite and dignified but he's nothing but a vengeful bastard who enjoyed murdering [[spoiler:Park Changho (though he survives) and Chairman Kang.]]

* KarmicDeath: This is how the downfall of [[spoiler:Choi Doha]] at the end of the series seems to be. After causing [[spoiler:Go Miho]] to become ill and die, he dies in a similar manner-- he gets the same illness as well. [[OffscreenKarma Although the death part isn't seen on screen]].
* KarmaHoudiniWarranty: [[spoiler:Choi Doha]] gets away with many of his misdeeds even after some of them are exposed to the public but it's only in the final episode, in the last scenes, that he gets punished with possible death.

* TheSyndicate: "Big Mouse" runs a large organization where the members received help from "Big Mouse" and has developed a symbiotic relationship since then. The organization has members referred to as the Big Three, as well.
* TalkingThroughTechnique: Following the incident of the drug clients’ list in episode 6, "Big Mouse" starts using tarot cards as a medium to convey messages to Changho in jail. In the beginning, it was one-way, but after Changho was convinced that the tarot card had something to do with "Big Mouse," he began using the cards to communicate back to the former.

* GoldTooth: The big man [[spoiler:Gong Jihoon]] hires to stay with Park Changho at the mental center has golden teeth fitting his creepy look and evil role.

* BreakTheHaughty: [[spoiler:warden Yoongab]] goes through this. He's full of himself and money-hungry but at one point he gets put in his place as he gets arrested for taking bribes, causing a big celebration, then assaulted by [[spoiler:the new warden]], ''then'' assaulted again by inmates who harbor a grudge against him.

* LaserGuidedKarma: Doubles as HumiliationConga. After {{blackmail}}ing and taking bribes from inmates and treating them like shit, [[spoiler:Park Yoongab]] gets put in jail for his corruption. Much later he receives a beatdown from the [[spoiler:new warden]] and when he goes to his cell room he gets stamped on by his cellmates as revenge.

** Episode 16: This is what prevents [[spoiler:Doha's wife]] from coming to court because [[spoiler:she]] was wrapped in a straitjacket and muzzled as [[spoiler:she]] thrashes around and tries to scream [[CallBack in the same way as Changho did]].

''(Chairman Yang stops anyone from intervening)''

--->'''Changho:''' I'm really curious. What did she [his mom] have after giving birth to a psycho like you? [...] I heard you killed nine people. Make it nine. You got the death penalty anyway, so what are you afraid of?

* {{Fanboy}}: Jerry is too fond of "Big Mouse" he tattooed a tiny mouse on his arm.

* FireAlarmDistraction: A fake fire alarm is started by [[spoiler:"Big Mouse"]] to save Changho from the mental institution and Jerry arrives disguised as one of the firefighters and comes to Changho's rescue.

* HitMeDammit: Up to eleven in Changho's case as he desperately begs two inmates and the prison officers to hit or kill him.

** The real [[spoiler:Choi Doha]] drowned when he was a child as the fake [[spoiler:Choi Doha, Cho Sunghyun,]] took the other's identity and came back to get revenge on [[spoiler:Chairman Kang.]]

** [[spoiler:The mayor of Gucheon]] gets away with corruption and even murder because he's that rich and powerful.

* TheUnfettered: Jihoon would do anything literally anything to get back the 280 billion won that "Big Mouse" stole from him including ColdBloodedTorture.
* VictorianNovelDisease: [[spoiler:Go Miho]] gets diagnosed with stage 4 cancer and other than spitting blood and having a nose bleed they remain looking healthy and as beautiful as ever even when dying. This is particularly notable because [[spoiler:the serial killer]] has cancer as well and he looks obviously sick and pale.

** In the final episode, [[spoiler:Joohee, Doha's wife,]] lies tied up in the same white empty room where Chang-ho was previously kept, so [[spoiler:she]] won't be able to show up and testify in court.

** He seeks the head of a powerful and terrifying gang and spills soup on his bald head. The gangster boss, or Chairman Yang, lets him, and then Changho smacks him with the food tray several times, then sends him flying with a strong punch.

--->'''Changho:''' What? This is not enough? [[PunctuatedPounding Kill [smack] me! [smack]]] Want an axe? Hey, bring him an axe. Are you a lumberjack? You can't kill without an axe?

--->'''Changho:''' I'm really curious. What did she (his mom) have after giving birth to a psycho like you? [...] I heard you killed nine people. Make it nine. You got the death penalty anyway, so what are you afraid of?

* PariahPrisoner: "The psycho" serial killer who murdered nine women is despised by everyone in jail and no one comes near to him because they fear him. It becomes quite a shock to everyone when Changho challenges the said psycho and manages to make him cry when he mentions the latter's mother.

* BedlamHouse: Changho is kidnapped and then taken to Jiseong Mental Center by [[spoiler:Gong Jihoon]]. [[WhiteVoidRoom The place, where everything is eerily white and silent, is empty]] save for a few mad patients, a nurse, and a deaf guy kept to watch him. They gagged his mouth and put him in a straitjacket, then injected a [[spoiler:truth serum into him more than once to force him to reveal "Big Mouse"'s real identity and where Jihoon's money is.]]

** Episode 16: This is what prevents [[spoiler:Doha's wife]] from coming to court because [[spoiler:she]] was wrapped in a straitjacket and muzzled as [[spoiler:she]] thrashes around and tries to scream [[CallBack in the same way Changho did]].

* {{Fanboy}}: Jerry is too fond of "Big Mouse" that he even tattooed a tiny mouse on his arm.

* GoldTooth: The big man Jihoon hires to stay with [[spoiler:Park Changho at the mental center]] has golden teeth fitting his creepy look and evil role.

* HitMeDammit: Up to eleven in Changho's case as he desperately begs two inmates and the prison guards to hit or kill him.

* PrisonsAreGymnasiums: Members of gangs are shown carrying weights and building up their muscles. PlayedForLaughs when Changho is shown to be doing pull-ups just for the whole shot to reveal that another man is carrying him on his shoulders out of respect after he gained a reputation that he's powerful in prison.

--->'''Changho:''' You ''[smacks his head]'' useless ''[smack]'' piece ''[smack]'' of crap ''[smack]''.
* RealityHasNoSoundtrack: Aside from the brief opening and ending credits and the "Brand New" OST that got played once, the series stands out for not having soundtracks unlike most Korean dramas.

** The [[spoiler:previous Gucheon warden Yoongab and Jerry]] turn out to be part of the "Big Mouse" organization.

* SuicideByCop: Changho is so desperate to end his life in jail, he seeks death by picking fights with dangerous criminals and the prison guards so they'd kill him. He fails miserably and becomes feared by prisoners instead.
* SwarmOfRats: Changho, hallucinating, sees a huge swarm of rats including two large rats near his bed in the psych ward. This is because he was tortured regarding "Big Mouse"'s real identity and how he's associated with this name that he began imagining rats everywhere.
* TheSyndicate: "Big Mouse" runs a large organization where the members received help from "Big Mouse" and has developed a symbiotic relationship since then. The organization has the Big Three members, as well.
* TalkingThroughTechnique: Following the incident of the drug clients’ list in episode 6, "Big Mouse" starts using tarot cards as a medium to convey messages to Changho in jail. At the beginning, it was one-way, but after Changho was convinced that the tarot card had something to do with "Big Mouse", he began using the cards to communicate back to "Big Mouse."

* WardensAreEvil: Park Yoongab is a classic example. As the main warden of Gucheon Prison, he's a vile man who collects money from the prisoners in exchange for favors and better treatment. He takes money from the three privileged prisoners from NR Forum in order to let them do however they want in prison without getting in trouble. He has no problem ordering the guards to kill Changho.

* BedlamHouse: Changho is kidnapped and then taken to Jiseong Mental Center by [[spoiler:Gong Jihoon]]. [[WhiteVoidRoom The place, where everything is eerily white and silent, is empty]] save for a few mad patients, a nurse, and a deaf guy kept to watch [[spoiler:him.]] They gagged his mouth and put him in a straitjacket, then injected a [[spoiler:truth serum into him more than once to force him to reveal "Big Mouse"'s real identity and where Jihoon's money is.]]

** Episode 16: This is what prevents [[spoiler:Doha's wife]] from coming to court because they were wrapped in a straitjacket and muzzled as she thrashes around and tries to scream [[CallBack in the same way Changho did]].
* BreakTheHaughty:
** [[spoiler:warden Yoongab]] goes through this. He's full of himself and money-hungry but at one point he gets put in his place as he gets arrested for taking bribes, causing a big celebration, then assaulted by [[spoiler:the new warden]], ''then'' assaulted again by inmates who harbor a grudge against him.
** Happens to [[spoiler:Joohee]], as well. She starts off as somewhat arrogant but circumstances such as discovering that [[spoiler:her husband killed Chairman Kang and him sending her to a mental health center and torturing her to stop her from testifying against him in court]] humbled her greatly.

* ColdBloodedTorture: [[spoiler:Gong Jihoon]] tortures Changho after kidnapping him from the penitentiary by putting food in front of him even though he has [[BoundAndGagged Changho wrapped in a straitjacket and his mouth gagged]]. Every time his consciousness fades due to [[spoiler:the truth serum they put in his body]], he gets slapped awake or has a bucket of water thrown at him. No matter how much he thrashes around and screams, they continue torturing him; asking him if he's "Big Mouse" and where are the 100 billion he stole.

* CrocodileTears: [[spoiler:Choi Doha]] sheds fake tears at [[spoiler:Chairman Kang's]] funeral. [[spoiler:The mayor]] is the one who killed the latter after all.

* DomesticAbuse: Han Jaeho (one of the [=VIPs=] who works as a surgeon) beats his wife. He even tries to choke her once but because she's afraid of him she hides it instead of reporting it to the cops.

* FakeDefector: [[spoiler:Park Yoongab]] pretends to oppose the idea of Changho as [[spoiler:the new "Big Mouse"]], and joins Doha's side instead. It turns out that he's deceiving Doha and he didn't switch sides.

* FrameUp: Changho being framed as "Big Mouse" and then thrown in jail is what kickstarts the story. The police suddenly find gold and tons of money hidden in the walls of his work office after someone gives him a spiked drink and he makes a car accident.
* GoldTooth: The big man Jihoon hires to stay with [[spoiler:Park Changho at the mental center]] has golden teeth.
* GroupIdentifyingFeature: All of "Big Mouse" followers have a tattooed knife on fire on their bodies which Changho alongside [[spoiler:the new warden]] use to identify "Big Mouse" and his underlings.

* HitMeDammit: Up to eleven in Changho's case as he practically begs for two different inmates and the prison guards to kill him several times.

* PayEvilUntoEvil: Park Changho instills fear in the people who harmed him and made him beg to live. He comes after them one by one; first, he suspends Jaeho with a noose just like he did to him, then threatens him into confessing that he helped kill Professor Seo. Second, he makes Dugeun hallucinate and imagine that Changho has cut his chest open and [[BeatStillMyHeart ripped his beating heart]]. As for Chaebong, he pours water on him and gives him an electric shock.
* PariahPrisoner: "The psycho" serial killer who murdered nine women is despised by everyone in jail and no one comes near to him because they fear him. It becomes quite a shock to everyone when Changho challenges the said psycho and manages to make him cry when he mentions his mother.

--->'''Changho:''' You ''[smacks head]'' useless ''[smacks]'' piece ''[smacks]'' of crap ''[smacks]''.
* RealityHasNoSoundtrack: Aside from the brief opening and ending credits and the "Brand New" OST that got played once, the series has no soundtracks.

** The [[spoiler:serial killer]] is revealed to be the FallGuy for the rich son of [[spoiler:Chairman Kang who's actually the one who killed 9 women]] but sent the said serial killer to go to jail in his place.

* {{Sadist}}: Jihoon revels in torturing [[spoiler:Park Changho]] to a certain degree going as far as laughing and clapping when the latter is screaming in pain.

** The imprisoned wealthy, influential members of the NR Forum can get away with near-murder, violence, and breaking the law in any way because, well, they have the money and power to do so in jail.

* TattooedCrook: The big, creepy, deaf guy Jihoon brings to keep an eye on [[spoiler:Park Changho]] and prevent the latter from escaping by beating [[spoiler:him]] is covered in tattoos.
* TruthSerums: Jihoon injects a truth serum called "Peace" more than one into [[spoiler:Park Changho so he'd spill the truth behind "Big Mouse."]] when he sent him into the mental asylum.
* TheUnfettered: Jihoon would do anything literally anything to get back the 280 billion won that "Big Mouse" stole from him including threats and torture.

* WhiteVoidRoom: The creepy room [[spoiler:Jihoon]] takes Changho to which exists in a mental institution consisting of nothing but vast whiteness.
* YouWakeUpInARoom: Changho wakes up at the start of episode 8 just to find himself in a white void place tied up in a straitjacket on a white bed. It turns out to be a remote mental center.

* BloodFromTheMouth: [[spoiler:Go Miho]] starts bleeding from the mouth near the last episode, which means [[spoiler:she's]] suffering from a deadly disease that is lymphoma, a blood cancer.

* HellholePrison: The prisoners in Gucheon Prison are forced to do manual labor such as cleaning up sewers and gardening. The prison warden takes bribes from the prisoners so they can get favorable treatment compared to others and the food they eat comes in small amounts and lacks variety.

* DomesticAbuse: Han Jaeho (one of the VIPs who works as a surgeon) beats his wife. He even tries to choke her once but because she's afraid of him she hides it instead of reporting it to the cops.

* HitMeDammitt: Up to eleven in Changho's case as he practically begs for two different inmates and the prison guards to kill him several times.

* PrisonersWork: Everyone (except for the VIPs) at Gucheon Prison is forced to do manual labor including gardening and cleaning the sewers.

* BedlamHouse: Changho is kidnapped and then taken to one by [[spoiler:Gong Jihoon]]. [[WhiteVoidRoom The place, where everything is eerily white and silent]], is empty save for a few mad patients, a nurse, and a deaf guy kept to watch [[spoiler:him.]] They put him in a straitjacket and gagged his mouth, then injected a [[spoiler:truth serum into him more than once so he'd tell them the truth about Big Mouse's real identity.]]

* BloodFromTheMouth: [[spoiler:Go Miho]] starts bleeding from [[spoiler:her]] mouth near the last episode, which means [[spoiler:she's]] suffering from a deadly disease that is lymphoma, a blood cancer.

* ColdBloodedTorture: [[spoiler:Gong Jihoon]] inflicts a mental torture on Changho after kidnapping him from the penitentiary. He puts food in front of him even though he has Changho wrapped in a straitjacket and his mouth gagged. Every time his consciousness fades due to [[spoiler:the truth serum in his body]], he gets slapped awake. No matter how much he thrashes and screams, they continue torturing him; asking him if he's "Big Mouse" and where are the billions of money "Big Mouse" stole.
* ConvenientlyAnOrphan: Changho is an orphan as there's no mention of his parents whatsoever.
* CrocodileTears: [[spoiler:Choi Doha]] sheds fake tears at [[spoiler:Chairman Kang's]] funeral. He is the one who killed him after all.

* DeathSeeker: After almost being hanged and beaten to death, Changho [[DespairEventHorizon loses all hope]] of his situation getting better and [[DrivenToSuicide decides to die]]. Afraid of a BungledSuicide attempt leaving him disabled, he then resorts to provoking the criminals in prison into fighting and killing him. The total opposite happens; he's still very much alive, unscathed, as no one lays a finger on him.

* DomesticAbuse: Han Jaeho (member of the NR Forum who works as a surgeon) beats his wife. He even tries to choke her once but because she's afraid of him she hides it instead of reporting it to the cops.

* FireAlarmDistraction: A fake fire alarm is started by [[spoiler:"Big Mouse"]] to save Changho from the mental institute and Jerry arrives disguised as one of the firefighters and comes to Changho's rescue.

** The protagonist, being trapped in a mental institution, starts seeing a rat on his leg, then the rat attacks him and the whole WhiteVoidRoom becomes [[SwarmOfRats full of rats]] while he screams in horror due to the effect of [[spoiler:the truth serum Jihoon gave him.]]

* LuxuryPrisonSuite: Gucheon Prison is your typical prison but this is the case for the wealthy prisoners who pay the warden to get them the best room with entertainment services like a pool table and Whisky.

* PrisonersWork: Everyone (except for the rich prisoners) at Gucheon Prison is forced to do manual labor including gardening and cleaning the sewers.

** The real [[spoiler:Choi Doha]] drowned when he was a child as the fake [[spoiler:Choi Doha]] took the other's identity and came back to get revenge on [[spoiler:Chairman Kang.]]

* {{Sadist}}: Jihoon revels in torturing [[spoiler:Park Changho]] to a certain degree going as far as laughing and clapping when the latter is screaming in fear.

* TruthSerums: Jihoon injects a truth serum called "Peace" more than one into [[spoiler:Park Changho so he'd spill the truth behind "Big Mouse."]] when he sent him into the mental alyssum.

* VictorianNovelDisease: [[spoiler:Go Miho]] gets diagnosed with stage 4 cancer and other than spitting blood they remain looking healthy and as beautiful as ever even when dying.

* WhiteVoidRoom: The creepy room [[spoiler:Jihoon]] takes Changho to which exists in a mental institution consists of nothing but vast whiteness.
* YouWakeUpInARoom: Changho wakes up at the start of episode 8 just to find himself in a white void place wrapped in a straitjacket on a white bed. It turns out to be a remote mental center.

* BullyingADragon: [[InvokedTrope Invoked]] to the extreme by the protagonist since his goal after he ends up in jail and reaches a dead end is to fight with scary criminals so they'd murder him.

* DomesticAbuse: Han Jaeho (the surgeon and member of the NR Forum) beats his wife. He even tried to choke her once but because she's afraid of him she hides it instead of reporting it to the cops. It ends with [[spoiler:her death at his hands though it was a mistake.]]

* TheDreaded: Changho slowly becomes one in prison after his violent confrontation with a SerialKiller and the boss of a powerful gang and how all the people who picked a fight with him committed suicide. When the head warden orders the prisoners in their cells watching other inmates get searched by the warden to put their heads back in their cells they don't listen to him. However, when Changho gives them a look, they all put their heads inside immediately out of fear.

* EvilIsHammy: Jihoon is a CorruptCorporateExecutive who tends to shout randomly and overreact. He claims that he loves Changho and is a fan of him in a dramatic, loud manner.
* FaintInShock: Miho faints after learning that her husband [[spoiler:died or so she thought.]]

* LaserGuidedKarma: Doubles as HumiliationConga. After {{blackmail}}ing and taking bribes from inmates and treating them like shit, [[spoiler:Park Yoongab]] gets put in jail for his corruption. Much later he receives a beatdown from the [[spoiler:new warden]] then when he goes to his cell room he gets stamped on by his cellmates as revenge.
* LuxuryPrisonSuite: Gucheon Prison is your typical prison but this is the case for the wealthy prisoners only who pay the warden to get them the best room with entertainment services like a pool table and Whisky.

* PrisonersWork: Everyone (except for the wealthy prisoners) at Gucheon Prison is forced to do manual labor including gardening and cleaning the sewers.

* SwarmOfRats: Changho, hallucinating, sees a huge swarm of rats including two large rats near his bed in the psych ward. This is because he was tortured regarding "Big Mouse"'s real identity and how he's associated with this name that he began imagining rats everywhere.

* TruthSerums: Jiheon injects a truth serum called "Peace" more than one into [[spoiler:Park Changho so he'd spill the truth behind "Big Mouse."]] when he sent him into the mental alyssum.
* TheUnfettered: Jiheon would do anything literally anything to get back the 280 billion won that "Big Mouse" stole from him including threats and torture.

* VillainWithGoodPublicity: When [[spoiler:Choi Doha]] runs for the presidency, he still wins even after his crimes got exposed.

* TheSadist: Jihoon revels in torturing [[spoiler:Park Changho]] to a certain degree going as far as laughing and clapping when the latter is screaming in fear.

'''Park Changho:''' Big Mouse. ''''\\

'''Park Changho:'' Listen. I'm really Big Mouse, you moron. [...] ''I'll show you why I'm Big Mouse.''

Will Miho succeeds in proving the innocence of her husband? What will happen to Changho in jail and will the real "Big Mouse" be revealed?

''Big Mouth'' (Korean title: 빅마우스) is an MBC [[FilmNoir Noir]]/Crime KoreanDrama television series. It ran for 16 episodes on July 29, 2022.

* TheDreaded: Changho slowly becomes one in prison after his violent confrontation with a SerialKiller and the boss of a powerful gang and how all the people who picked a fight with him committed suicide. When the head warden orders the prisoners in their cells watching other prisons get searched by the warden to put their heads back in their cells they don't listen to him. However, when Changho gives them a look, they all put their heads inside immediately out of fear.

** Chaebong hallucinates that Changho ripped his heart out of his chest. In reality, Changho just cut a piece of his clothes.

* VictorianNovelDisease: [[spoiler:Go Miho]] gets diagnosed with stage 4 cancer and other than spitting blood. They remain looking healthy and as beautiful as ever even when dying.

* RealityHasNoSoundtrack: Aside from the brief opening and ending credits and the "Brand New" OST that got played once, the series has no music whatsoever.

Not to be confused with the animated [[Creator/Netflix Netflix]] show ''WesternAnimation/BigMouth''.

* ConvenientlyAnOrphan: Changho is an orphan; there's no mention of his parents whatsoever.

* GroupIdentifyingFeature: All of "Big Mouse" followers have a tattooed knife on fire on their bodies which Changho alongside [[spoiler:the new warden]] use to identify "Big Mouse" and his allies.
* {{Hallucinations}}: The protagonist, being trapped in a mental institution, starts seeing a rat on his leg, then the rat attacks him and the whole WhiteVoidRoom becomes [[SwarmOfRats full of rats]] while he screams in horror due to the effect of [[spoiler:the truth serum Jihoon gave him.]]

* HumiliationConga: When the wicked [[spoiler:Park Yoongab]] gets arrested for abusing his position, all the prisoners cheer upon his arrival at the penitentiary, receives a NoHoldsBarredBeatdown by the [[spoiler:new warden]], then gets beat up again when he enters his cell.

** [[spoiler:Noh Park]] is revealed to be the real "Big Mouse." They were the one who framed Changho as the swindling "Big Mouse" to [[spoiler:save him from dying at the hands of the NR Forum.]]

----
* PariahPrisoner: "The psycho" serial killer who murdered nine women is despised by everyone in jail and no one comes near to him because they hate his guts. It becomes quite a shock to everyone when Changho challenges the said psycho and manages to make him cry when he mentions his mother.
* PrisonsAreGymnasiums: Members of gangs are shown carrying weights and building up their muscles. PlayedForLaughs when Changho is shown to be doing pull-ups just for the whole shot to reveal that another man is carrying him on his shoulders out of respect after he gained a reputation that he's powerful in prison.
* PrisonRiot: Changho starts one when the prisoners complain about the food's quality, and having to do manual work like cleaning poop. He loudly demands real food from the warden after threatening him secretly. Needless to say, they win and get what they want.
* PrisonersWork: Everyone (except for the wealthy prisoners) at Gucheon Prison is forced to do manual labor including gardening and cleaning the sewers.
* PunctuatedPounding:
** Changho beats up Chairman Yang with a food tray in this manner.
** Changho does this again to the serial killer inmate on death row.
--->'''Changho:''' You ''[smacks head]'' useless ''[smack]'' piece ''[smack]'' of crap ''[smack]''.
* RealityHasNoSoundtrack: Aside from the brief opening and ending credits and the "Brand New" OST that got played once, the series has no music whatsoever.
* TheReveal:
** [[spoiler:Noh Park]] is revealed to be the real "Big Mouse." They were the one who framed Changho as the swindling "Big Mouse" to [[spoiler:save him from dying at the hands of the NR Forum.]]
** The real [[spoiler:Choi Doha]] drowned when he was a child as the fake [[spoiler:Choi Doha]] took the other's identity and came back to get revenge on [[spoiler:Chairman Kang.]]
* SwarmOfRats: Changho, hallucinating, sees a huge swarm of rats including two large rats near his bed in the psych ward. This is because he was tortured regarding "Big Mouse"'s real identity and how he's associated with this name that he began imagining rats everywhere.
* TheSyndicate: "Big Mouse" runs a large organization where the members received help from "Big Mouse" and has developed a symbiotic relationship since then. The organization has the Big Three members, as well.
* TattooedCrook: The big, creepy, deaf guy Jihoon brings to keep an eye on [[spoiler:Park Changho]] and prevent the latter from escaping by beating [[spoiler:him]] is covered in tattoos.
* TruthSerums: Jiheon injects a truth serum called "Peace" more than one into [[spoiler:Park Changho so he'd spill the truth behind "Big Mouse."]] when he sent him into the mental alyssum.
* TheUnfettered: Jiheon would do anything literally anything to get back the 280 billion won that "Big Mouse" stole from him including threats and torture.
* VictorianNovelDisease: [[spoiler:Go Miho]] gets diagnosed with stage 4 cancer and other than spitting blood. They remain looking healthy and as beautiful as ever even when dying.
* WardensAreEvil: Park Yoongab is a classic example. As the main warden of Gucheon Prison, he's a vile man who collects money from the prisoners in exchange for favors and better treatment. He takes money from the three privileged prisoners from NR Forum in order to let them do however they want in prison without getting in trouble. He has no problem ordering the guards to kill Changho.
-->'''Changho:''' ''[thinking]'' The cruelest murderer in this penitentiary is the warden.
* WhiteVoidRoom: The creepy room [[spoiler:Jihoon]] takes Changho to which exists in a mental institution consists of nothing but vast whiteness.
* YouWakeUpInARoom: Changho wakes up at the start of episode 8 just to find himself in a white void place wrapped in a straitjacket on a white bed. It turns out to be a remote mental center.

----
->''"I have no fear. Because I'm Big Mouse."''

'''Park Changho:''' Big Mouse. \\

'''Park Changho:''' Listen. I'm really Big Mouse, you moron. [...] ''I'll show you why I'm Big Mouse.''

Not to be confused with the animated Creator/{{Netflix}} show ''WesternAnimation/BigMouth''.

* CrowdChant: Every prisoner at Gucheon Prison chants "Big" (short for "Big Mouse") in support of Changho when he has to prove to Jihoon that he knows the names of the five clients "Big Mouse" sold drugs to, basically that he's really "Big Mouse". It's so epic that this is the first and only time the show plays a song in a scene.

* DomesticAbuse: Han Jaeho (the surgeon and part of the NR Forum) beats his wife. He even tried to choke her once but because she's afraid of him she hides it instead of reporting it to the cops. It ends with [[spoiler:her death at his hands though it was a mistake.]]

* TheDreaded: Changho slowly becomes one in prison after his violent confrontation with a SerialKiller and the boss of a powerful gang and how all the people who picked a fight with him committed suicide. When the head warden orders the prisoners in their cells watching other prisons getting searched by the warden to put their heads back in their cells they don't listen to him. However, when Changho gives them a look, they all put their heads inside immediately out of fear.

* [[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/mv5bnm.jpg]]

->'''Warden Park:''' Who do you think you are?\\
'''Park Changho:''' Big Mouse. ''''\\
'''Warden Park:''' What?\\
'''Park Changho:'' Listen. I'm really Big Mouse, you moron. [...] ''I'll show you why I'm Big Mouse.''

''Big Mouth'' (Korean title: 빅마우스) is an MBC [[FilmNoir Noir]]/Crime KoreanDrama television series. It ran for 16 episodes on July 29, 2022.

Park Changho is a third-rate lawyer with a low success rate. He is known as "Big Mouth" between his peers and clients because he talks big but doesn't have the actions to back it up. One day, he gets tangled up in a murder case involving the upper class when Choi Doha, the mayor of Gucheon, asks him to take up the case. His life turns upside down as he's mistaken for a famous conman that goes under the name "Big Mouse" and gets sent to prison.

Enters Go Miho, Changho's loving and brave wife who works as a nurse. When her husband is accused of being the mysterious conman "Big Mouse" [[ClearTheirName she vows to clear up his name]] and support him no matter what with the help of her father (Go Gikwang) and Changho's best friend who's also a lawyer.

Will Miho succeeds in proving the innocence of her husband? What will happen to Changho in jail and will the real "Big Mouse" be revealed?

The series blends Noir elements (like a hellish prison environment and corrupt people in power) and mystery elements like the true identity of the "Big Mouse", and even dramatic elements.

Not to be confused with the animated [[Creator/Netflix Netflix]] show ''WesternAnimation/BigMouth''.

!!This series provides examples of:

* BaldOfAuthority: The boss of the biggest and most powerful gang in Gucheon Penitentiary, aka Yang Chunshik, is baldheaded.
* BedlamHouse: Changho is kidnapped and then taken to one by [[spoiler:Gong Jihoon]]. [[WhiteVoidRoom The place, where everything is eerily white and silent]], is empty save for a few mad patients, a nurse, and a deaf guy kept to watch [[spoiler:him.]] They put him in a straitjacket and gagged his mouth, then injected a [[spoiler:truth serum into him more than once so he'd tell them the truth about Big Mouse's real identity.]]
* BewareTheNiceOnes: Miho is generally pleasant and kind but she can fight and talk back when she's provoked enough.
* BloodFromTheMouth: [[spoiler:Go Miho]] starts bleeding from [[spoiler:her]] mouth near the last episode, which means [[spoiler:she's]] suffering from a deadly disease that is lymphoma, a blood cancer.
* BullyingADragon: [[InvokedTrope Invoked]] to the extreme by the protagonist since his goal after he ends up in jail and reaches a dead end is to fight with scary criminals so they'd murder him.
** He seeks the head of a powerful and terrifying gang and spills soup on his bald head. The gangster boss, or Chairman Yang, lets him, and then Changho smacks him with the food tray several times, then sends him flying with a strong punch.
--->'''Changho:''' Try killing me.\\
''(Chairman Yang stops anyone from intervening)''
--->'''Changho:''' What? This is not enough? [[PunctuatedPounding Kill [smack] me! [smack]]] Want an axe? Hey, bring him an axe. Are you a lumberjack? You can't kill without an axe?
** He then goes after a serial killer diagnosed as a psychopath and hurls insults, such as:
--->'''Changho:''' I'm really curious. What did she (his mom) have after giving birth to a psycho like you? [...] I heard you killed nine people. Make it nine. You got the death penalty anyway, so what are you afraid of?
* ClearTheirName: Changho's wife will do anything to prove his innocence and get him out of jail even if it puts her in danger and against her husband's wishes.
* ColdBloodedTorture: [[spoiler:Gong Jihoon]] inflicts a mental torture on Changho after kidnapping him from the penitentiary. He puts food in front of him even though he has Changho wrapped in a straitjacket and his mouth gagged. Every time his consciousness fades due to [[spoiler:the truth serum in his body]], he gets slapped awake. No matter how much he thrashes and screams, they continue torturing him; asking him if he's "Big Mouse" and where are the billions of money "Big Mouse" stole.
* ConvenientlyAnOrphan: Changho is an orphan; there's no mention of his parents whatsoever.
* CrowdChant: Every prisoner at Gucheon Prison chants "Big" (short for "Big Mouse") in support of Changho when he has to prove to Jihoon that he knows the names of the five clients "Big Mouse" sold drugs to. It's so epic that this is the first and only time the show plays a song in a scene.
* CyanidePill: One of the guys who tried to kill Changho committed suicide by taking a cyanide pill. Subverted later as it turns out that [[spoiler:warden Yoongab is the one who gave them cyanide by telling them it's a sedative.]]
* DeathSeeker: After almost being hanged and beaten to death, Changho [[DespairEventHorizon loses all hope]] of his situation getting better and [[DrivenToSuicide decides to die]]. Afraid of a BungledSuicide attempt leaving him disabled, he then resorts to provoking the criminals in prison into fighting and killing him. The total opposite happens; he's still very much alive, unscathed, as no one lays a finger on him.
* DespairEventHorizon: Changho crosses it after being unjustly thrown in jail and beaten up by the influential prisoners and almost hanged by them. He contemplates committing suicide and divorcing his wife, who strongly refuses.
->'''Changho:''' Miho. You need to face reality. There's no hope for me. I may rot in prison for the rest of my life, [[InsultOfEndearment stupid]]. ''[choked up]'' ''I may die''.
* DomesticAbuse: Han Jaeho (the surgeon and part of the NR Forum) beats his wife. He even tried to choke her once but because she's afraid of him she hides it instead of reporting it to the cops. It ends with [[spoiler:her death at his hands though it was a mistake.]]
* TheDon: Chairman Yang is the head of one of the prominent gangs in Gucheon Penitentiary.
* TheDreaded: Changho slowly becomes one in prison after his violent confrontation with a SerialKiller and the boss of a powerful gang and how all the people who picked a fight with him committed suicide. When the head warden orders the prisoners in their cells watching other prisons getting searched by the warden to put their heads back in their cells they don't listen to him. However, when Changho gives them a look, they all put their heads inside immediately out of fear.
* EvilLaugh: Jihoon has one, especially when he [[spoiler:tortures Changho.]]
* {{Fanboy}}: Jerry is too fond of "Big Mouse" that he even tattooed a tiny mouse on his arm.
* FakingTheDead: [[spoiler:Park Changho]] pretends to be shot by Yoongab who's filming the murder scene to [[spoiler:Choi Doha.]]
* FauxAffablyEvil: [[spoiler:Choi Doha]] turns out to be this. He pretends to be polite and dignified but he's nothing but a vengeful bastard who enjoyed murdering [[spoiler:Park Changho (though he survives) and Chairman Kang.]]
* FireAlarmDistraction: A fake fire alarm is started by [[spoiler:"Big Mouse"]] to save Changho from the mental institute and Jerry arrives disguised as one of the firefighters and comes to Changho's rescue.
* FrameUp: Changho being framed as "Big Mouse" and then thrown in jail is what kickstarts the story. The police suddenly find gold and tons of money hidden in the walls of his work office after someone gives him a spiked drink and he makes a car accident.
* GoldTooth: The big man Jihoon hires to stay with [[spoiler:Park Changho at the mental center]] has golden teeth.
* GroupIdentifyingFeature: All of "Big Mouse" followers have a tattooed knife on fire on their bodies which Changho alongside [[spoiler:the new warden]] use to identify "Big Mouse" and his allies.
* {{Hallucinations}}: The protagonist, being trapped in a mental institution, starts seeing a rat on his leg, then the rat attacks him and the whole WhiteVoidRoom becomes [[SwarmOfRats full of rats]] while he screams in horror due to the effect of [[spoiler:the truth serum Jihoon gave him.]]
* HellholePrison: The prisoners in Gucheon Prison are forced to do manual labor such as cleaning up sewers and gardening. The prison warden takes bribes from the prisoners so they can get favorable treatment compared to others and the food they eat comes in small amounts and lacks variety.
* HumiliationConga: When wicked [[spoiler:Park Yoongab]] gets arrested for abusing his position, all the prisoners cheer upon his arrival at the penitentiary, receives a NoHoldsBarredBeatdown by the [[spoiler:new warden]], then gets beat up again when he enters his cell.
* KarmicDeath: This is how the downfall of [[spoiler:Choi Doha]] at the end of the series seems to be. After causing [[spoiler:Go Miho]] to become ill and die, he dies in a similar manner-- he gets the same illness as well. [[OffscreenKarma Although the death part isn't seen on screen]].
* KarmaHoudiniWarranty: [[spoiler:Choi Doha]] gets away with many of his misdeeds even after some of them are exposed to the public but it's only in the final episode, in the last scenes, that he gets punished with possible death.
* LaserGuidedKarma: Doubles as HumiliationConga. After {{blackmail}}ing and taking bribes from inmates and treating them like shit, [[spoiler:Park Yoongab]] gets put in jail for his corruption. Much later he receives a beatdown from the [[spoiler:new warden]] then when he goes to his cell room he gets stamped on by his cellmates as revenge.
* LuxuryPrisonSuite: Gucheon Prison is your typical prison but this is the case for the wealthy prisoners only who pay the warden to get them the best room with entertainment services like a pool table and Whisky.
* TheManTheyCouldntHang: The NR Forum prisoners greet Changho by suspending him by a noose with a chair under his feet. They don't kill him but they come close to it.
* PayEvilUntoEvil: Park Changho instills fear in the people who harmed him and made him beg to live. He comes after them one by one; first, he suspends Jaeho with a noose just like he did to him, then threatens him into confessing that he helped kill Professor Seo. Second, he makes Dugeun hallucinate and imagine that Changho has cut his chest open and [[BeatStillMyHeart ripped his beating heart]]. As for Chaebong, he pours water on him and gives him an electric shock.
* PariahPrisoner: "The psycho" serial killer who murdered nine women is despised by everyone in jail and no one comes near to him because they fear him. It becomes quite a shock to everyone when Changho challenges the said psycho and manages to make him cry when he mentions his mother.

->'''Changho:''' You ''[smacks head]'' useless ''[smacks]'' piece ''[smacks]'' of crap ''[smacks]''.

** The [[spoiler:previous Gucheon warden Yoongab and Jerry]] turn out to be part of the "Big Mouse" organization.

->'''Changho:''' ''[thinking]'' The cruelest murderer in this penitentiary is the warden.

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* PariahPrisoner: "The psycho" serial killer who murdered nine women is despised by everyone in jail and no one comes near to him because they hate his guts. It becomes quite a shock to everyone when Changho challenges the said psycho and manages to make him cry when he mentions his mother.
* PrisonsAreGymnasiums: Members of gangs are shown carrying weights and building up their muscles. PlayedForLaughs when Changho is shown to be doing pull-ups just for the whole shot to reveal that another man is carrying him on his shoulders out of respect after he gained a reputation that he's powerful in prison.
* PrisonRiot: Changho starts one when the prisoners complain about the food's quality, and having to do manual work like cleaning poop. He loudly demands real food from the warden after threatening him secretly. Needless to say, they win and get what they want.
* PrisonersWork: Everyone (except for the wealthy prisoners) at Gucheon Prison is forced to do manual labor including gardening and cleaning the sewers.
* PunctuatedPounding:
** Changho beats up Chairman Yang with a food tray in this manner.
** Changho does this again to the serial killer inmate on death row.
--->'''Changho:''' You ''[smacks head]'' useless ''[smack]'' piece ''[smack]'' of crap ''[smack]''.
* RealityHasNoSoundtrack: Aside from the brief opening and ending credits and the "Brand New" OST that got played once, the series has no music whatsoever.
* TheReveal:
** [[spoiler:Noh Park]] is revealed to be the real "Big Mouse." They were the one who framed Changho as the swindling "Big Mouse" to [[spoiler:save him from dying at the hands of the NR Forum.]]
** The real [[spoiler:Choi Doha]] drowned when he was a child as the fake [[spoiler:Choi Doha]] took the other's identity and came back to get revenge on [[spoiler:Chairman Kang.]]
* SwarmOfRats: Changho, hallucinating, sees a huge swarm of rats including two large rats near his bed in the psych ward. This is because he was tortured regarding "Big Mouse"'s real identity and how he's associated with this name that he began imagining rats everywhere.
* TheSyndicate: "Big Mouse" runs a large organization where the members received help from "Big Mouse" and has developed a symbiotic relationship since then. The organization has the Big Three members, as well.
* TattooedCrook: The big, creepy, deaf guy Jihoon brings to keep an eye on [[spoiler:Park Changho]] and prevent the latter from escaping by beating [[spoiler:him]] is covered in tattoos.
* TruthSerums: Jiheon injects a truth serum called "Peace" more than one into [[spoiler:Park Changho so he'd spill the truth behind "Big Mouse."]] when he sent him into the mental alyssum.
* TheUnfettered: Jiheon would do anything literally anything to get back the 280 billion won that "Big Mouse" stole from him including threats and torture.
* VictorianNovelDisease: [[spoiler:Go Miho]] gets diagnosed with stage 4 cancer and other than spitting blood. They remain looking healthy and as beautiful as ever even when dying.
* WardensAreEvil: Park Yoongab is a classic example. As the main warden of Gucheon Prison, he's a vile man who collects money from the prisoners in exchange for favors and better treatment. He takes money from the three privileged prisoners from NR Forum in order to let them do however they want in prison without getting in trouble. He has no problem ordering the guards to kill Changho.
-->'''Changho:''' ''[thinking]'' The cruelest murderer in this penitentiary is the warden.
* WhiteVoidRoom: The creepy room [[spoiler:Jihoon]] takes Changho to which exists in a mental institution consists of nothing but vast whiteness.
* YouWakeUpInARoom: Changho wakes up at the start of episode 8 just to find himself in a white void place wrapped in a straitjacket on a white bed. It turns out to be a remote mental center.

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->''"I have no fear. Because I'm Big Mouse."''