Mine would be in the episode "Pig-Boy and his Dog",
Elenor: My life is a vast grey corridor.
Franklin: I've been there before there is a little midget there that makes googily eyes at me; I called him Mr. Pickleni!
Or in the episode Dr. Jay
French Doctor: I'm sorry sir you only have three months to live.
Duke: What if i gave you some of that Neon Toilet Paper you frenchies call money.
French Doctor: I would say Merci Beaucoup three months to live.