A purely liquid and sometimes greasy diarrhea-like excretion. Usually uncontrallably released while farting.
Anonymous Soldier 1: Guys, I need to eat something before we go drinking, or else I'm gunna have to take a hydro dump at the end of the night.
Anonymous Soldier 2: Hurry up and grab that loaf of bread on the counter!
Anonymous Soldier 2: Hurry up and grab that loaf of bread on the counter!
by Josh Sabourin May 20, 2007
When you have to pee very bad and can't get to a restroom so you padlock and let loose in your ass to hold it until you make it to the bathroom so you can shit it out like diarrhea. This may dislodge fecal matter and come out in spurts causing your ass to have a machine gun effect while shitting.
Levi what the hell happened to your toilet? Joseph you won't believe this. I couldn't make it home in time so I padlocked and pissed in my ass. As soon as I got home I couldn't hold it in my ass any longer and ended up hydro dumping all over the toilet.
by I Am The Ferrett January 9, 2020