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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!
by Josh Sabourin May 20, 2007
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