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.

Common Names:

Name	Pronounced	Usage
Archibald	AHR-chə-bawld	Scottish, English
Rab	-	Scottish
Kukka	KOOK-kah	Finnish
Inga	ING-ah (Swedish), ING-gah (German), EEN-gah (Russian)	Swedish, Danish, Norwegian, Icelandic, Latvian, Lithuanian, German, Russian, Ancient Scandinavian, A
Amy	['eimi]
Davud	-	Persian