A vagina ranking with foul odor and wretched aesthetics. Often resembling the ass of a femal chimpanzee in heat coupled with oily discharge.

Verb; act of being a koos slabber
N. You should have seen the shit can of a vagina on this chick. It looked like a butchers waste basket. A real koos slabber.

V. Frank is being a real koos slabber
by thepeachcobbler November 29, 2017
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