grass on
Avancé (C1) slang
To secretly tell the police or someone in charge about what another person has done wrong.
"Nobody likes him at school because he's always grassing on his classmates."
Écoutez en contexte
Breathtaking Wildlife Worlds - Narrated by David Attenborough | BBC Earth
BBC Earth · 143:13
the grass on which they depend.
How this center keeps thousands of pounds of hazardous waste from landfills | March 18, 2026
CNN 10 · 2:03
We plant grass on it and move on.
Where hard to recycle materials get a second life
CNN 10 · 1:07
We plant grass on it and move on.