bang your heads together

Meaning

1. bang / knock your / their heads together

   to force people to stop arguing and behave in a sensible way

From the same entry

• a head
• be banging, your head against a brick wall
• be head and shoulders above
• bite head off
• bring to a head
• bury your head in the sand
• can't make head nor tail of
• do head in
• do standing on your head
• from head to foot
• get your head down
• get your head round