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cheese eater

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noun Slang.
  1. an informer; rat.
  2. a person who betrays, denies, or abandons his or her associates, social group, beliefs, etc.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for cheese eater

Historical Examples

  • A Greek author has described the Crow as a cheese-eater—but that's a fable.

    Punchinello, Vol. 1, No. 25, September 17, 1870

    Various