Phrasal Verb 'grass'

We have 2 phrasal verb definition related to 'grass'.

Grass on

Meaning:

Report someone to a person in authority

Example:

He GRASSED ON us and got us into a lot of trouble.

Grass up

Meaning:

Report someone to a person in authority

Example:

She didn't to GRASS them UP, even though they'd been bullying her badly.