knock (some) sense in(redirected from knock sense in)
knock (some) sense in
To assist or persuade someone to start thinking sensibly (about something). Jason is convinced that he wants to get a tattoo once he turns 18, but I'm hoping we'll be able to knock sense in before then. They think they'll find success with their high school rock band, so I hope that getting booed off the stage at the talent show knocks some sense in.