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1. Talking a lot, and saying nothing. More accurately, saying nothing of interest or importance. Often spoken by dullards, nobodies, and the insecure.

2. A bizzare digestive reversal, whereupon a person defecates orally. A shitty *turn* of events, excretorally speaking.
1. Somebody needs to tell Michael to stop mouth shitting about clothes I wear more than once.

2. Are you mouth shitting? That must taste terrible!
by Dr jebus PhD May 09, 2009
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