When a person paints the wall behind the toilet with explosive diarrhea while attempting to sit. Also known as a photo finish. The best masterpieces are created after 12 beers and greasy mexican food.
My god! Someone created a poocasso in the men's bathroom!
by Johnny Slipshot March 04, 2005
Someone who gets fecal matter on their finger and smears it on something.
I gotta go wash the walls again, Helen.

My little Johnny is quite the Poocasso.
by LuckyPunk777666 July 04, 2010
To get drunk and crap all over a public establishment
uh, oh! looks like he pulled another poocasso in the mens room!
by senormobius March 03, 2005

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