Top definition
Tattletale, stool pigeon, squealer, snitch, double-crosser, weasel.
That rat fink Lenny sold me out to Tommy G!
by Rodney Basil August 28, 2004
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May 17 Word of the Day
Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.
I felt deep sonder thinking about the all the people who looked up this word along with me.
by rednos January 10, 2013
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2
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
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3
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
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4
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
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5
Very derogatory descriptive slang from the 60's. You thought Mother Fucker was bad, Rat-Fink was the 60's word for mother fucker.
by You're such a mother fucker November 13, 2015
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6
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
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