Not sure if this one qualifies, but in another episode of WKRP the station manager's kid tells Les Nesman (after a payment of five dollars) that his mother thinks he's obtuse. He then nods, reads the dictionary definition, and reacts to the wrong part.
"Ah, obtuse. Greater than 90 degrees, dull, rounded at the free end. [beat, then a lunge at the kid] I just paid that kid five bucks to find out his mother thinks I'm rounded at the free end!"
Not sure if this one qualifies, but in another episode of WKRP the station manager's kid tells Les Nesman (after a payment of five dollars) that his mother thinks he's obtuse. He then nods, reads the dictionary definition, and reacts to the wrong part.