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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.
fink on someone
Sl. to inform parents, the authorities, etc. on someone. You're not going to fink on me, are you? Chuck finked on all of us.
fink out (on someone or something)
Sl. to decide not to cooperate with someone or something (after all). Come on, don't fink out on us now. Bob finked out on the plan.
a rat fink(American informal)
an extremely unpleasant person, or someone who has given secret information about you to the police If I find the rat fink who informed on me, he won't live long enough to do it again.
1. n. an informer; a stool (pigeon). (see also rat fink.) Taylor has turned into a fink. She can’t be trusted.
2. Go to fink (on someone).
3. n. any strange or undesirable person. You are being such a fink. Stop it!
fink (on someone)
in. to inform on someone. Rocko never finks on his friends.
See fink on someone
fink out (on someone/something)
in. to decide not to cooperate with someone or something (after all). Come on, don’t fink out on us now.
n. an informer. (see also rat.) That guy is nothing but a rat fink. A dirty squealer!