Top Definition
A female mammal that would be the equivalent of a raccoon and possum mating. They would waddle much like that of a raccon also having the circular motifs around their eyes. They would be pesky like a possum and just as nasty as an overgrown rat.
Wow Kim sure is a poscoon. I bet she has a fupa too.
by meangirls April 17, 2007
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