Hippo poop refers to a dump that forcefully sprays in all directions, similar to the way a hippo marks its territory
"Man that burrito gave me hippo poop."

www.youtube.com/watch?v=sIZSb8uiuck
by Ben Carsten December 3, 2007
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A guy who laughs at anything and everything.
Savannah: "Oh my god, he's so stupid. He's laughing at nothing... "
Brandie: "Yeah, I know. He's such a hippo poop."
by Savanita September 10, 2007
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