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rat fink

noun

Definition of rat fink 

: fink, informer

Examples of rat fink in a Sentence

who's the sorry rat fink that went squealing to the cops? regrets ever doing business with that rat fink, who cheated him out of gobs of money

First Known Use of rat fink

1964, in the meaning defined above

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The first known use of rat fink was in 1964

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