bang/knock your/their heads together

knock your/their/our heads together

To scold two or more people harshly. If you two do something this stupid again, I'm going to knock your heads together!
See also: head, knock, together
Farlex Dictionary of Idioms.

bang/knock your/their ˈheads together

(informal) force people to stop arguing and behave in a sensible way: I’d like to bang those stupid politicians’ heads together.
See also: bang, head, knock, together
Farlex Partner Idioms Dictionary
See also:
  • knock back
  • knock one back
  • knock something back
  • knock
  • knock (something)
  • knock about with (one)
  • knock up
  • knocked up
  • knock somebody dead
  • knock someone dead