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A disbaraging term for an infant or child that insults the parents, especially the mother. Extrapolated from the idea that a really dirty vagina would have rats.
Bitch, get your cunt-rat off the hood of my car! How long before that girl starts spewing cunt-rats?
by The West Side Smasher April 24, 2003
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A cunt of the absolute highest order. Not just a Cunt but a Cunt Rat
Hey did you hear that Tommy grassed to the feds”

“Really ... What an absolute Cunt Rat”
by Tony Poolips October 19, 2017
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