When one has a poop so sloppy it flows like that of a river
Tom Hanks was so upset by the homemade guacamole made by Meg Ryan that he went to her master bathroom and had a butt river.
by baustin52 November 8, 2012
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When you have diarehha to the point its shooting out your butt
Im sick and i have mass river butt
by Fodrizzle01 April 23, 2016
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