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