grass up

verb

grass up

verb

Etymology From grass (“informer”) + up.

1

UK, Slang To betray by informing on.

My sister grassed me up to the caretaker! She thought she was doing me a favour — by grassing me up she was sure he'd let me off.1999, Angela Devlin, Bob Turney, Going Straight: After Crime and Punishment, →ISBN:

Synonyms: drop a dime, name names, snitch
Related terms: supergrass

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.