Top definition
When you've been holding your pee for literally more than 3 hours so when you finally do release your pee, you don't have to push it out, it just flows.
Dude, I was at that party all night, and when I got home, I had to take a fat piss.
by Hollywood8245 November 03, 2007
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2
having to pee really bad
Dude, I gotta take a fat piss
by Bethany182rwj November 16, 2003
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