Top Definition
A sexual act of someone vomiting in one's anus, then the person whos anus got vomited in poops it back into the vomiter's mouth.
1. We spent the whole night pea soup waterfalling. it was soo hot.
2. Did you hear that the Trix rabbit and Lucky performed a pea soup waterfall? it was magically delicious!
by Dusty Doornails November 15, 2007

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