cheese-eater

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cheese-eater

One who is regarded as a traitor. "Cheese" alludes to rats eating cheese, playing on the definition of "rat" meaning "traitor." The gang was determined to find the cheese-eater who told the police about their illegal activities.

cheese-eater

n. an informer; a rat fink. (Rats eat cheese.) Some cheese-eater called the clerk and warned her we were coming.