Nixon: "Oh, expletive deleted!"
Bender:"Compare your lives to mine and then kill yourselves..."
Mario: "Mamma mia! The red meatball of war has soiled our white pants of piece!"
Fry (seeing Donkey Kong): "Hey, I know that monkey! His name's Donkey!
Professor: "Monkeys can't be donkeys! Stop messing with my mind!"
Professor: "Sweet Zombie Jesus!"
[at the basketball game]
Fry: "I wanna show off my skills..."
Professor: "Will said skills pay the bills?" (great little Beastie Boys reference)
Hermes:"My Manwich!!"
Zoidberg (spying a guinea pig before getting turned into a giant):"What's this? Two meals in one week?"

Giant Zoidberg:"Ah, now Zoidberg is now big! Who's pushing who now? Ah, hello Mr Chase Manhatten Bank...DENY MY CREDIT CARD APPLICATION, WILL YOU!?!? [SMASH! then turns to another building] The famed Apollo theater....BOO ME OFF THE STAGE ON OPEN MIKE NIGHT?!?!?! [SMASH!]
Giant Bender: "Hey, quit wrecking my stuff!
Zoidberg:" Tell it to the claw!"
Giant Bender: "Bite my colossal metal ass!"
"Bubblegum" Tate: "Sweet Clyde, laugh derisively in his face!
Morbo (introducing the presidential candidates):"Puny human number 1..puny human number 2 and Morbo's close personal friend, Richard Nixon...
Nixon: "Hello, Morbo. How's the family?"
Morbo:"Beligerent and numerous..."
[deleted scene]
Professor (talking in his sleep): "What?! The Great Zombie Jesus came back from the dead again?" (or something like that)