Give them a thick ear - Idioms by The Free Dictionary
give (one) a thick ear (redirected from give them a thick ear)
give (one) a thick ear
To discipline one, typically a child, by hitting them. Primarily heard in UK. Mom will give me a thick ear if she finds out that I broke her antique vase.
give someone (or get) a thick ear punish someone (or be punished) with a blow, especially on the ear. British informal
give somebody/get a thick ˈear (British English, informal) hit somebody/be hit on the side of the head, as a punishment: If you don’t behave yourself you’ll get a thick ear.