Examples of dimwitted jerks in South Park.
- Eric Cartman may be cunning when it comes to creating evil schemes at times, but he's otherwise dimwitted and clueless, and sometimes his mean tricks only make him look like an idiot. A good example is "Cartman Sucks", where he tries to humiliate Butters in a very stupid way (which is actually more humiliating to Cartman himself than Butters), then gets easily tricked by Kyle into believing his Blatant Lies about "gay polarity".
- Randy Marsh. Despite being an educated scientist (a geologist, to be exact), he often acts like an incredibly airheaded and selfish Manchild. His tendency to impulsively engage in crazy antics to satisfy his hedonistic desires has caused endless grief for his wife and children, often acting stubbornly and willfully ignorant of their protests.
- Stephen and Linda Stotch are quite abusive towards Butters, finding excuses to punish him and being outright inconsiderate to his well-being. However, they have also proven themselves to be just as clueless and idiotic as the other parents, especially in "Marjorine" and "City Sushi".
- Carol and Stuart McCormick are ignorant, alcoholic Lower-Class Louts who often beat each other up over trivial matters. And while they're not as bad as the Stotches, they (especially Stuart) are nonetheless quite neglectful and distant towards their children.
- Mr. Garrison is an extremely incompetent teacher at South Park Elementary School who puts no effort into actually teaching his students anything. He is also extremely delusional and insane, regularly displaying severe anger issues and psychopathic tendencies, which sometimes lead to violent outbursts of rape and murder.
- Mayor McDaniels is an egotistical Know-Nothing Know-It-All who looks down on everyone she views as inferior, makes idiotic decisions that result in chaos, and has no problem ordering Officer Barbrady to shoot a group of defenseless children because they were allegedly part of a terrorist group.
- Sgt. Harrison Yates is a Dirty Cop who is grossly incompetent at his job, has zero qualms about using lethal force against unarmed children, and outright admits that he only joined the police force so he could beat up minorities.
- The rest of the adult population (with a few exceptions) also qualifies; they are often complete idiots who couldn't care less about the world around them, screw each other over for petty reasons, and are prone to going on psychotic rampages when anything goes wrong.
- Clyde Donovan has become this as an adult in the Bad Future shown in "Post Covid" and "The Return of Covid". He strongly believes in the already-disproven myths about COVID vaccines, to the point that he stubbornly refuses to get vaccinated despite knowing that he can get the federal quarantine around South Park lifted if he does so. Clyde also becomes easily manipulated by Cartman into trying to kill a child and proceeds to continue this murder attempt even after Cartman changes his mind and orders him to stand down.
