rat fink

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rat fink

1. One who is regarded as a traitor for reporting criminal activity to the police. Primarily heard in US. The gang was determined to find the rat fink who told the police about their illegal activities.
2. An unpleasant person. Mike is such a rat fink that I can't even stand being in the same room as him.
See also: fink, rat

rat fink

n. an informer. (see also rat.) That guy is nothing but a rat fink. A dirty squealer!
See also: fink, rat
References in periodicals archive ?
Newspapers remain a more thorough source for election news, but a majority of the public still gleans most of its information from television, and ads eagerly fill the void, labeling rivals lying, rat-fink bastards.
The reaction of CLWA management to the purported information leak was to label the unidentified leaker a rat-fink and to look for ways of finding and punishing him for telling the truth about the incident.
Daffy the rat-fink has just exposed Bugs' latest disguise, so Bugs takes off the costume and says, "That's right, Doc, I'm a wabbit.
If this were Chicago, those rat-finks would be in Lake Michigan.