What is Piss Ass?
1.
A term used to express the euphoria of the famous, yet painful, poop, which involves much water (piss), with the expected, but inadequate, actual poop. In severe cases, blood can be involved.
I've got to take a dump.
*Sits on the toliet*
*Sounds of a hose pouring into water*
Fucking piss ass.
See
2.
piss ass is used when you are describing something that is junk or and piece of shit.
"look at that little piss ass car over there"
See