TAKE BY THE SCRUFF

{v. phr.} 1. To assert authority over a person. * /Tim's mother took him by the scruff and told him to get cleaned up./ 2. To punish a person. * /The boss took us by the scruff when he found us chatting idly by the coffee machine./ 3. To assume firm control over a job or a situation that has been causing some difficulty. * /Someone had better take the post office by the scruff; there are too many customer complaints pouring in./