grass up

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English[edit]

Etymology[edit]

From grass ‎(informer).[1]

Verb[edit]

grass up

  1. (Britain, slang) To betray by informing on.
    • 1999, Angela Devlin, Bob Turney, Going Straight: After Crime and Punishment (ISBN 187287066X):
      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.

Related terms[edit]

References[edit]

  1. ^ The New Partridge Dictionary of Slang (ISBN 0415259371)