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1.
Real name of an alcoholic beverage that Americans (and only Americans) refer to as "beer".
The name was supposedly chosen to better reflect the original taste.

Originated from Postal 2.
Jeez dude, you call that beer? That cat piss tastes like Buttgeyser!
by MasterJoe August 13, 2006

Words related to Buttgeyser

bud budweiser butt buttweiser cat piss geyser jeez lame postal 2
 
2.
the splash that enters your butt due to your sphincter not being fully closed, once you drop a hefty turd
"john took a solid dump, one of the turds was so big it gave him a butt geyser"
by vladboy11 November 20, 2011