Top Definition
A stool in which you are sitting while having a drink with your friends. When you mistakenly have to much, you jump off the stool to run to the bathroom. Unfortunately, you don't make it in time and somehow vomit gets all over the bar stool, your friends shoes, and some how in your girlfriend's purse.
Guy 1: Hey, that's your 14th Cosmo, bro. Are you sure you're feeling alright?
Guy 2: Now that you mention it, I ----
(Guy 3 approaches )
Guy 1: Woah, dude. I wouldn't sit there. It's a barfstool.
by pongogorb April 19, 2010

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