Top Definition
while at partys you occasionally notice a woman of defined body and stature of a bison.

Party bison are more often than not sexually aggressive, although appearing lethargic. after 3 smirnoff ices they try to spend the night with drunkened male party-goers who have drank far more than her. parties don't have to be limited to one bison, there may be many in a single room.
Charles T: "Did you watch that party bison wander into the Brewery?"

M. Boskey: "yeah, im pretty sure Donny hooked up with her"
by Sailing Away January 30, 2011

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