Lisa: "Dad, we did something very bad!"
Homer: "Did you wreck the car?"
Bart: "No."
Homer: "Did you raise the dead?"
Lisa: "Yes!"
Homer: "But the car's okay?"
Lisa and Bart: "Uh-huh."
Homer: "Alright then."

Nelson: "There's a time for crumping and this isn't it."

Season 11 on DVD finally today

Moe: "So you guys are Euro-trash huh? Hows that working out for ya?"

Marge: "Look, they're making a movie! Robert Downey Jr is shooting it out with the police!"

Bart: "I don't see any cameras."

Homer: [gasps] You mean I get five percent off on everything in the store just because I look like -- I mean, just because I _am_Krusty the Klown?

Apu: How could I charge full price to the man whose lust for filthy magazines kept me in business during that first shaky year?
[quietly] Oh, by the way, here is your new issue of "Gigantic Asses". [holds up magazine with a large butt on it]

Still one of my favorite bits...

Homer: "Do you sell toys?"
Mysterious Owner: "We sell forbidden objects from places men fear to tread... we also sell frozen yogurt, which I call Frogurt!"
Homer: "Well, I need something for my son's birthday."
Owner: "Ah, perhaps this will please the gentleman." (The owner's hand strays over various oddities and monstrosities before picking up a Krusty the Clown doll.) "Take this object, but beware. It carries a terrible curse."
Homer" "Oh, that's bad."
Owner: "But it comes with a free Frogurt!"
Homer: "That's good!"
Owner: "The Frogurt is also cursed."
Homer: "That's bad."
Owner: "But you get your choice of toppings."
Homer: "That's good!"
Owner: "The toppings contain Potassium Benzoate. (Pauses, waiting for Homer to respond. Homer stares at him, blankfaced.) "That's bad."
Homer: "Can I go now?"

Ozzy Osborne: Right, and the award for best Hardcore Thrash Metal goes to "Simpsons Christmas Boogie"?!

rofl

Bart: "Wait, I can stretch! Look at me! I must only use this power to annoy."

Redneck: "Well pardon us Mr. Gucci Loafers."
Homer: "I bought these shoes from a hobo."