Someone who, at a party drinks too fast too much. Usually pukes everywhere, like a "puking dragon" Is loud, boisterous, and smells funny. Makes an ass of him(her)self, and usually ruins their welcome, unless with the closest of friends.
The DrunkenYeti is best kept locked inside it's domicile, where it can harass the community of online gamers.
"Man! You might want to call Becky and apologize, the other night you were a drunken yeti!"
"Dood, the other night you started puking all over the camp site. Thanks for being a drunk yeti again!"