Since you're new here, I'm gonna cut you a break... today. So, why don't you make like a tree... and get out of here.

Biff Tannen

Marty McFly: Doc, you don't just walk into a store and buy plutonium. Did you rip that off?
Dr. Emmett Brown: Shhhhhh. Of course. From a group of Libyan nationalists. They wanted me to build them a bomb, so I took their plutonium and in turn, gave them a shoddy bomb-casing full of used pinball machine parts! Come on! Let's get you a radiation suit. We must prepare to reload.

Marty McFly: This is uh... This is heavy duty, Doc. This is great. Uh... does it run, like... on regular unleaded gasoline?
Dr. Emmett Brown: Unfortunately no, it requires something with a little more kick - plutonium.
Marty McFly: Uh... plutonium? Wait. Are you telling me that this sucker is nuclear?
Dr. Emmett Brown: Hey, hey, hey. Keep rolling. Keep rolling, there. No, no, no. This sucker's electrical, but I need a nuclear reaction to generate the 1.21 jigawatts of electricity I need.

Marty McFly: Wait a minute, Doc, are you trying to tell me that my mother has got the hots for me?
Dr. Emmett Brown: Precisely.
Marty McFly: Whoa, this is heavy.
Dr. Emmett Brown: There's that word again; "heavy". Why are things so heavy in the future? Is there a problem with the earth's gravitational pull?

No, wait! Doc. The... the... the bruise! The bruise on your head. I know how that happened! You told me the whole story. You were standing on your toilet, and you were hanging a clock, and you fell, and you hit your head on the sink. And that's when you came up with the idea for the Flux Capacitor... which... is what... makes time travel possible.

Marty McFly

Dr. Emmett Brown: I suppose Jane Wyman is the First Lady!
Marty McFly: Whoa! Wait! Doc!
Dr. Emmett Brown: And Jack Benny, the Secretary of the Treasury.
Marty McFly: Doc, You gotta listen to me.
Dr. Emmett Brown: I've had enough practical jokes for one evening. Good night, Future Boy!

Dr. Emmett Brown: Then tell me, "Future Boy," who's President in the United States in 1985?
Marty McFly: Ronald Reagan.
Dr. Emmett Brown: [laughs] Ronald Reagan. The actor? Then who's VICE-President? Jerry Lewis!

Stella Baines: He's a very strange young man.
Sam Baines: He's an idiot. Comes from upbringing. Parents are probably idiots too. Lorraine, if you ever have a kid that acts that way I'll disown you.

[stands tall with a hand over his heart] Mayor Goldie Wilson. Like the sound of that.

Goldie Wilson

Goldie Wilson: No, sir! I'm gonna make something of myself. I'm going to night school. And one day I'm gonna be somebody!
Marty McFly: That's right, he's gonna be mayor!
Goldie Wilson: Yeah, I'm gonna... Mayor! Now that's a good idea! I can run for mayor.
Lou: A colored mayor, that'll be the day.
Goldie Wilson: You wait and see, Mr. Carruthers. I will be mayor! I'll be the most powerful man in Hill Valley. I'm gonna clean up this town.
Lou: Good. You can start by sweeping the floor.

Goldie Wilson: Say! Why do you let those boys push you around like that for?
George McFly: Well, they're bigger than me.
Goldie Wilson: Stand tall, boy. Have some respect for yourself. Don't you know if you let people walk over you now, they'll be walking over you for the rest of your life! Look at me. You think I'm gonna spend the rest of my life in this slop house?
Lou: Watch it, Goldie!

Lou: You gonna order something, kid?
Marty McFly: Ah, yeah... Give me a Tab.
Lou: Tab? I can't give you a tab unless you order something.
Marty McFly: All right, give me a Pepsi Free.
Lou: You want a Pepsi, pal, you're gonna pay for it!

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Back to the Future Quotes

[Marty places headphones over his father's ears and wakes him up by playing Van Halen music at full blast. George wakes up screaming - Marty pauses the music. George looks up to see Marty, who is unrecognizable because he is wearing a radiation suit]
George McFly: Who are you?
Marty McFly: [after giving him another earful of loud rock music] Silence Earthling! My name is Darth Vader. I am an extraterrestrial from the planet Vulcan!
[makes Live Long and Prosper sign with his hand]

[Biff is waxing George's car, it's a silver BMW]
George McFly: Uh... now Biff, I want make sure that we get two coats of wax this time. Not just one.
Biff Tannen: Just finishing up the second coat now.
George McFly: Now Biff, don't con me!
Biff Tannen: I-I'm-I'm sorry, Mr. McFly. I-I meant I was just starting on the second coat.
George McFly: Ahh... Biff. What a character. Always trying to get away with something. I've had to stay on top of Biff ever since High School. Although if it wasn't for him...
Lorraine Baines: We never would have fallen in love.
George McFly: That's right.