When you've been walking around to much and the crack of your ass gets chafed.
God, we've been walking around all day. I've got massive party butt. That sucks.
by bkjones98 June 14, 2006
Top Definition
The morning results of drinking the night prior.

Syn: Liquor Shits
Dana had party butt so bad yesterday that we had to pull over every 30 minutes on our way home.
by Haley Allison January 20, 2008
its what happens after a long night of partying and dringing beer. its the morning after beer shit.
man i just party butted all over your shitter.
by mwss 471 July 14, 2009
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