From any of the three films
  1. It's LEAVE, you idiot - make like a tree and LEAVE. You sound like a damn fool when you say it wrong!
  2. Marty he's in a '46 Ford, we're in a Delorean. He'd rip through us like we were tinfoil.
  3. McFly! You bojo! Those boards don't work on water!
  4. The justice system works swiftly here in the future, now that they've abolished all lawyers
  5. Lorraine, you are my density
  6. Dear Marty, if my calculations are correct, you will receive this letter immediately after seeing the DeLorean struck by lightning
  8. I'm sure plutonium is readily available in 1985, future boy, but here in 1955 it's hard to come by
  9. Look! It's Calvin Klein! Isn't he a dreamboat?
  10. I say if you're gonna make a time machine, do it in style.
  11. Why don't you just make like a tree and get outta here?