A Pablo Poocaso is when someone shits on ones chest and then decides to recreate a pablo pacaso painting with there penis as a paintbrush, or as some call it, a poobrush.
Hey Justin bring your fat poobrush over here and finish this damn Pablo Poocaso that you started on Zachs chest.
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.