What does the name fink mean?

A Fink is a name described to someone who tells on you to get you in trouble for doing something bad you don't want to be told about doing shouldn't have been doing at the wrong time of the day. Sometimes a Fink is someone who just tells on you to purposely try to get you in trouble. Also sometimes a Fink is also someone who tells on you against your wishes to help or help someone else likeif you were sick or being beaten or knew someone who was sick or being beaten. Another name for a fink is a nark, a snitch, a rat, a squeal or a squealer, a tattle tale, or even a blabber mouth. The term is still used today just not as much anymore. it was used much more it's the 60 to 80's.