Danny: Uh, I'm not very hungry; just gimme a double Polar Burger wit' everything and a cherry soda wit' chocolate ice cream.
Principal McGee: We have pictures of you so-called mooners. And just because the pictures aren't of your faces doesn't mean we can't identify you. At this very moment those pictures are on their way to Washington where the FBI has experts in this type of identification. If you turn yourselves in now, you may escape a Federal charge.
Frenchy: Doody, how do I look?
Doody: Like a beautiful blonde pineapple!
Danny: You can't just walk out of a drive-in.
Rizzo: Ok, so what do you guys think this is a gang bang?
Sonny: Yeah, you wish.
Cha Cha: They call me Cha Cha because I'm the best dancer at St. Bernadette's.
Frenchy: With the worst reputation.
Frenchy: Beauty-school sure wasn't as I thought it would be.
Vi: Nothing ever is.
Vince: It doesn't matter if you win or lose, it's what you do with your dancin' shoes.
Jan: You mean you're dropping out?
Frenchy: I don't look at it as dropping out! I look at it as a very strategic career move.
Danny: You know, if we fix up this car, it could be make-out city, you know that.
Sonny: Right, the chick is gonna have to put out before she even gets in.
Jan: Don't let me near the refreshment stand! Take my money away from me! I'm not hungry! I'M NOT HUNGRY!
Frenchy: I wish I had a guardian angel to tell me what to do. You know, like Debbie Reynolds had in "Tammy." What do you think?
Vi: If you find him, give him my phone number.
Answer: Watched that scene again now and I just think it was poor writing (in what's still a classic film regardless). How none of the judges noticed that Cha Cha took another girl's (Sandy's) place even after she'd already been "tapped out" is another huge plot hole. Plus a lot of people in America were watching the dance on TV and it's not mentioned by anyone after this scene. 35 years later and that scene still bugs me (haha).