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
Kaarlo	KAH:R-lo	Finnish
Sissinnguaq	-	Native American, Greenlandic
&Thorn;ÓRgÍSl	-	Ancient Scandinavian
Kalla	KAL-ə	English (Rare)
Quique	KEE-ke	Spanish
Neasa	NYAS-a, NAS-a	Irish, Irish Mythology