"The Homer They Fall"
Season 8, Episode 3

Bart becomes the coolest dude in school when he rocks the $4 gimmicky utility belt that he copped from Comic Book Guy. But flossing so freely leads to Jimbo, Dolph, and Kearney chasing Bart down to get their hands on the ill accessory. When Bart points out that Jimbo doesn't even have a belt, Kearney points out that Bart's ragging on his cord. Fists are thrown, and Bart ends up not even being able to return to the belt, ending up with a classic case of buyer's remorse