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English definition of “grass on sb”

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grass on sb

UK slang
verb uk phrasal verb with grass   /ɡrɑːs/ us    /ɡræs/
If a person grasses on someone else, they tell the police or someone in authority about something bad that that person has done: Dan grassed on them to the local police.
Translations of “grass on sb”
in Chinese (Traditional) 向警方告密, 向警方告發(某人)…
in Chinese (Simplified) 向警方告密, 向警方告发(某人)…
(Definition of grass on sb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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