I should've broke your thumbs!
2 seconds sound clip from the Rocky (1976) movie soundboard.
You can hear this line at 00:15:55.672 in the Blu-ray version of the movie.
Quote context
[...]
- These guys think that we're runnin' some kind of charity or somethin'. That they can get off light.
- Hey, how do you spell Del Rio?
- Come on!
- Hey, I won't let that happen no more... about the thumb. You know?
- I should've broke your thumbs!
- Hey, Rock, heard you did real good last night.
- Absolutely. You should've seen me.
- Don't you think you oughta take a rest?
- My back is hurtin'. You deaf?
- Hey, yo, Mike, where's my lock? Whose stuff is this in my locker?
- It's Dipper's stuff. It ain't your locker no more.
[...]