knock (one's) head off

knock (one's) head off

To strike one with great force, usually in the head. Usually used as a threat or a hypothetical action. If you insult me like that again, I'll knock your head off! That football nearly knocked my head off. I'm glad I ducked in time!
See also: head, knock, off
Farlex Dictionary of Idioms.

I’ll knock your ˈblock/ˈhead off!

(British English, spoken) used to threaten somebody that you will hit them
See also: block, head, knock
Farlex Partner Idioms Dictionary
See also:
  • too long; didn't read
  • get, have, etc. the sniffles
  • sniffle
  • snuffle
  • get, have, etc. the snuffles
  • circle the drain
  • circling the drain
  • be well in
  • be well in (with)
  • be a fate worse than death