Damn it, Biff. That's it. I'm leaving.
4 seconds sound clip from the Back to the Future Part II movie soundboard.
You can hear this line at 00:48:21.478 in the Blu-ray version of the movie.
Quote context
[...]
- Look at him. He's a butthead, just like his old man was.
- Don't you dare speak that way about George. You're not even half the man he was.
- Always the little hothead, huh?
- You wanna take a poke at me?
- Damn it, Biff. That's it. I'm leaving.
- So go ahead. But think about this, Lorraine!
- Who's gonna pay for all your clothes, huh? And your jewelry and your liquor?
- Who's gonna pay for your cosmetic surgery, Lorraine?
- You were the one who wanted me to get these things. If you want them back, you can have them.
- Look, Lorraine. You walk out that door, and I won't only cut off you. I'll cut off your kids.
[...]