a knuckle sandwich
This page is about the idiom a knuckle sandwichINFORMAL
If you give someone a knuckle sandwich, you punch them.
- If you say that again you'll get a knuckle sandwich!
- Simon said he'd give me a knuckle sandwich if I wasn't careful, so I said "Come on then, let's go outside!"
This is a humorous idiom usually used among friends when they're joking.
See Idiom of the Day today
Contributor: Matt Errey