Supergrass
noun, slang ·Moderate ·College level
Definitions
- 1 An informer providing substantial quantities of information on criminal or terrorist activities to the police. UK, slang
"I have to tell the hon. and learned Gentleman that I do not know the facts which led to that decision. On the other hand, although it is an unpleasant fact of life, there are now and again occasions on which, in order to achieve convictions against really bad villains, it is necessary to use people who are termed supergrasses."
- 2 a police informer who implicates many people wordnet
Example
More examples"I have to tell the hon. and learned Gentleman that I do not know the facts which led to that decision. On the other hand, although it is an unpleasant fact of life, there are now and again occasions on which, in order to achieve convictions against really bad villains, it is necessary to use people who are termed supergrasses."
Etymology
From super- + grass, from grass (“an informer”).
More for "supergrass"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.