knock some sense into somebody
knock/talk some ˈsense into sb idiom
to try and persuade sb to stop behaving in a stupid way, sometimes using rough or violent methods
• Try and talk some sense into her before she makes the wrong decision.
• Where would I be without you to knock some sense into my head?
knock (some) sense into sb
knock (some) sense into sb INFORMAL
to forcefully teach someone not to be foolish:
A couple of years in the army will knock some sense into him.