Marty McFly: Calvin? Why do you keep calling me Calvin?
Lorraine Baines: Well, that is your name, isn't it? Calvin Klein? It's written all over your underwear.
Wyatt: By the way, why are we wearing bras on our heads?
Gary: It's ceremonial.
[Later, after Wyatt talks to Chet, Wyatt begins to leave the kitchen and Chet sees him wearing women's underwear.]
Chet: Like your panties.
Wyatt: [walking back into kitchen] It's a joke, Chet. Really.
Chet: No. That is not a joke. That is a severe behavioral disorder. Next thing you know you'll be wearing a bra on your head.
Darren Woods: She was a good ship.
Suicide: You think this is a fuckin' costume? This is a way of life.
Chris Knight: Do you mind if I name my first child after you? "Dipshit Knight" has a nice ring to it.
Herbert West: I know your work, Dr. Hill. Quite well. Your theory on the location of the will in the brain is... interesting. Though derivative of Dr. Gruber's research in the early 70s. So derivative in fact in Europe it's considered plagiarized.
Col. Malcolm Grommett Spears: The yellow sons of bitches, they took their own lives! Commie bastards, you cheated me.
Space Girl: I am the feminine in your mind, Carlsen.
Art Selwyn: Men should be explorers, no matter how old they are. I don't know about anybody else, but I'm going.
General Graycliffe: A child with a stick of chewing gum has just rendered your hundred million dollars of hardware useless.
Captain Rhodes: Go on run, run you fucking lunatics.
Max: We'll go on the count of three.
Max and Pig Killer together: One...
[Max yanks the door open.]
Pig Killer: What happened to two?
Mike Davison: We're sweating like champs and Fennel wasn't sweating at all.