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The layer of chunks left floating on the water after a violent liquid bowel movement. Usually more visually effective when romain lettuce and corn is eaten the day before.
I tripped over my dog on my to the bathroom to make a Butt Pizza!
by Kerzwhile August 29, 2006
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When someone places their pizza(and eventually eats) on the bench in the change room full after sports, usually ice hockey. Post-sports usually has naked, sweaty or recently showed butts on the bench; a great place to put down your pizza slice.
Everyone looked at Glen as he ate up his butt pizza. I would never eat butt pizza, but others don't seem to mind.
by dsjkfhsfhwi3thwnwfioenfsfsdf October 31, 2018
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