grass on someone

UK slang
If a person grasses on someone else, they tell the police or someone in authority about something bad that that person has done
انگلیسی بریتانیایی، زبان عامیانه
گزارش ارتکاب جرم یا خلاف کسی را به پلیس یا مقامات ذیربط دادن
... [مشاهده متن کامل]

Dan grassed on them to the local police.
I can’t believe he grassed on me to the teacher.
If you grass on me, I’ll never forgive you.
He’s a grass. He’ll tell the police everything he knows.