blow some mud

To defecate a somewhat loose watery stool with a gale force fart behind it so as to cake the excrement like a mud pie against the porcelain toilet bowl.

Please excuse me for a moment from this delectable chocolate sundae desert that you made for me, but I have the need to use the ladies room in order that I might blow some mud.

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Mud Blowing

The act of spitting the poo that your partner unexpectedly deposited in your mouth during a rim job (analingus) back in his mouth. Some people may like this, but, in general, it is thought to be an act used to get back at a guy for pooing in your mouth without warning.

Allison: Mid-rim job, he pooped in my mouth without any warning, so I decided mud blowing was the best way to get the punk back.

Katherine: He shouldn't have at that second Fiber One bar...

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