Always a fan of "Sweet Zombie Jesus."
Not to mention the treasure trove of lines from Zapp Brannigan: "More chamPAGin?" "Soon, you'll be crawling back for that sweet, sweet candy. Pow." "I have a very sexy learning disability called ... Kif?" "*sigh* Sexlexia."
Others I like: "It'll be fun on a bun", "Hello, Moderate Spender," (Bender as the Gender Bender)"I'm a real toughie!" (Bender as BendHer) "The boys like it when you glom it on!" (sung) "All Hail Robonia - a country I didn't make up!" (sung) "Jimmy Crack Corn and I don't care, Jimmy Crack Corn and I don't care, Jimmy Crack Corn and Bender's great, take that you stupid corn!"