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When you pull your penis out and womans anal cavity and there are traces of fecal matter surround the tip of your manhood.
A: Man, i tottaly got a mud mushroom last nite while banging your sister!

B: Clean that mud mushroom of yours!
by RichoFromRezza November 01, 2008

Words related to Mud Mushroom

anal anus dirty fecal mushroom penis sex shit