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1.
An overweight bitch who likes to party and get sloppy over all the dudes. Can be heard from 4-6 miles away, weather permitting.
1: Who the fuck is that fat drunk bitch?
2: She's one of the local party buffalos.
by Blakenheim February 13, 2008
 
2.
The ugly friend of that hot girl you are trying to hit on at the party. She inevitably cock blocks you.
What happened dude? I thought you were gonna get some.
Her party buffalo of a friend cut in.
by J Dunks July 21, 2013