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11.
a cross between a rat, a fink, and a mouse. This is an odd animal only found in seclusive arounds in western egypt. It evolved quite a bit ago when a natural formation of toxic chemicals spilled on to a fink colony in the ground. The smell atracked rats all over the world to partake in the delicious meal. The finks, only half dead at this time, were consumed by the rats and were absorbed into the rats' DNA due to the nuclear contents of the fink. This disaster was the end to Finks, but the birth of ratfinks. However, this disaster made the rats shun the ratfinks because they were different.
A: Look, a ratfink!
B: What's a ratfink?
A: sigh, a ratfink is a cross between a rat, a fink, and a mouse. This is an odd animal only found in seclusive arounds in western egypt. It evolved quite a bit ago when a natural formation of toxic chemicals spilled on to a fink colony in the ground. The smell atracked rats all over the world to partake in the delicious meal. The finks, only half dead at this time, were consumed by the rats and were absorbed into the rats' DNA due to the nuclear contents of the fink. This disaster was the end to Finks, but the birth of ratfinks. However, this disaster made the rats shun the ratfinks because they were different.

B: I really dont care
by guess December 22, 2004
 
1.
Tattletale, stool pigeon, squealer, snitch, double-crosser, weasel.
That rat fink Lenny sold me out to Tommy G!
by Rodney Basil August 28, 2004
 
2.
A goofy looking rat character designed by Ed "Big Daddy" Roth.

A show car designed by Ed "Big Daddy" Roth.
Big Daddy's Rat Fink car of 1963 was a kart driven by a Cadillac starter motor.
by Cap'n Bullmoose May 06, 2005
 
3.
A bastard modifier. A person exhibiting especially abhorrent levels of bastardry is known as a "ratfink bastard." Alternately, for a milder offense, the term "ratfink" can be used independently of bastard.
Do you know where Jared is? Next time you see him, tell that ratfink bastard I'm going to tear out his scrotum for knocking up my sister.

Timmy's the kind of lazy ratfink that leaves half a sheet of toilet paper on the roll just so he doesn't have to replace it with a new one.
by marahnna January 11, 2008
 
4.
1. the combination of two terms used to describe the underhandedness of some one to stress what a low down sneak they are.
Matt is a rat fink, he told the teacher I snuck another cupcake.
by Bud E Love May 07, 2003
 
5.
1. just another way to call someone an jerk
2. a song by an AMAZING band.. the misfits. ROCK ON
dude joe is being a rat fink

F!! I SAID F.I.!!! F.I.N.!! F.I.N.K.!!! F.I.N.K. FINK FINK FINK FINK!!
by misfitfan April 17, 2005
 
6.
lying twoheaded, manipulitive, hypochondriac with crazy tendancies.
"dude chris is such a rat fink"
by appidodo October 03, 2008
 
7.
Rat fink is an experssion used to describe a person who has features that make him/ her look very rat like. These features could be hair that make them look stupid, or facial hair that is patchy, or just a very skinny face.
Man that new guy tony is such a RatFink!

yo did you just see that Ratfink , his beard is so stupid.

some bitch called me a Ratfink, so i smashed his window
by bob8999 March 07, 2007