Yak Butt

Someone with a large ass approximately the size of a Yak.
Dude, that ckicks Yak Butt almost tuched me.
by Kevin May 01, 2006
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Butt-yak

VERB, An expulsion of flatus during a bowel movement that is powerful enough to throw a heavy spatter of semi-liquid feces in a muddy spraypaint fashion.
I butt-yakked so hard that I got some on the seat!
by The West Side Smasher April 24, 2003
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