grass up
English edit
Etymology edit
From grass (“informer”)[1] + up.
Pronunciation edit
Audio (AU) (file)
Verb edit
grass up (third-person singular simple present grasses up, present participle grassing up, simple past and past participle grassed up)
- (UK, slang) To betray by informing on.
- 1999, Angela Devlin, Bob Turney, Going Straight: After Crime and Punishment, →ISBN:
- 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.
Synonyms edit
- drop a dime, name names, snitch; See also Thesaurus:rat out