knock block off

knock (one's) block off

To strike someone with great force, usually in the head. If you insult me like that again, I'll knock your block off!
See also: block, knock, off
Farlex Dictionary of Idioms.

knock someone's block off

Sl. to hit someone hard in the head. Wilbur almost knocked Tom's block off by accident. He threatened to knock my block off if I didn't do as I was told.
See also: block, knock, off
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • knock (one's) block off
  • knock someone's block off
  • I'll knock your block/head off!
  • block
  • knock someone’s block off
  • cut off at the pass, to
  • the block is hot
  • What will that prove?
  • go on the block
  • block off