Supergrass Definition

noun

An informer providing substantial quantities of information on criminal or terrorist activities to the police.

Australian Phillip Inglis is an infamous supergrass.
Wiktionary
Synonyms:

Other Word Forms of Supergrass

Noun

Singular:
supergrass
Plural:
supergrasses

Origin of Supergrass

  • From grass, British/Irish slang word for an informer.

    From Wiktionary

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Unscrambles

supergrass