The Simpsons jumped the shark in one of my favorite episodes. The term is named after the notorious episode of Happy Days in which Arthur Fonzarelli literally jumps a shark. In this episode, Fonzie is the coolest dude on the show — on television, really — and jumping a shark is actually a parody of coolness. By this logic, the moment The Simpsons jumps the shark should be a creative high point, an episode in which a main character becomes a caricature, that they untether themselves from the reality and logic established until that point.