Young Biff: Why don't you make like a tree and get out of here?
Old Biff: It's leave, you idiot! "Make like a tree, and leave." You sound like a damn fool when you say it wrong.
Young Biff: All right then, leave! And take your book with you!
Biff Tannen, I wouldn't marry you if you had a million dollars.Lorraine Baines
Biff Tannen: That's about as funny as a screen door on a battleship.
Marty McFly: [under his breath] It's screen door on a submarine, you dork.
Young Doc: No! It can't be; I just sent you back to the future!
Marty McFly: No, I know; you did send me back to the future. But I'm back ... I'm back from the future.
Young Doc: Great Scott! [faints]
Marty McFly: Doc! Doc! Doc!
Marty! What in the name of Sir Isaac H. Newton happened here?Doc
Doc: The time-traveling is just too dangerous. Better that I devote myself to study the other great mystery of the universe: women!
Marty McFly: [Reading newspaper in 2015] "Within two hours of his arrest, Martin McFly Jr. was tried, convicted and sentenced to fifteen years in the state penitentiary." In two hours?
Doc: The justice system works swiftly in the future now that they've abolished all lawyers.
Marty McFly: There he is, Doc! Let's land on him, we'll cripple his car.
Doc: Marty, he's in a '46 Ford, we're in a DeLorean. He'd rip through us like we were tin foil.
Young Jennifer: I'm old!
Old Jennifer: I'm young!
Mack: You should be taking a dirt nap after that ragdoll today.
Johnny Blaze: I got lucky.
Mack: I've got a dog named Lucky - he's got one eye and no nuts. Lucky don't cover it JB. You got an angel looking after you.
Johnny Blaze: Maybe it's something else.
300 Feet! Pretty neat, pretty neat!Johnny Blaze
Johnny Blaze: My daddy once said, "If you don't make a choice, the choice makes you."
Roxanne Simpson: Yea, why do your choices always keep us apart?