(1) to do smb a favour, to do smb a good turn them too and that you re just dying to do them a favour. It s sort of funny, in a way. (J. Salinger) 2. This is for a friend who s done me a good turn. (1. Mur¬doch) 3. "1 came to do you a good turn," she said. (J. Wain)