grass on (one)
grass on (one)
slang To inform against a criminal or wrongdoer to a figure of authority. Primarily heard in UK. I'm afraid the Mafia will make a hit on me since I grassed on them to the police about their money-laundering operation. Why would you grass on me to the teacher like that?
See also: grass, on
Farlex Dictionary of Idioms.
- grasse
- snitch on
- snitch on (one)
- grass up
- squeal on
- squeal on (one)
- make someone
- gen up on (something)
- inform against (one)
- tattle