Rectal mucus discharge. "S.O.M.A.", literally, an acronym for "Snot Out (of) My Ass". For individuals with IBS (irritable bowel syndrome) or colinitis, this discharge is a common occurrence. The discharge is often following flatulence. S.O.M.A. can, in rare instances, indicate Krohn's disease.
Gentleman recalling a story: "So there I was in the can, I pushed and thought was going to take a dump, and it was a big jelly mess of s.o.m.a.!
by Muroftra February 6, 2008
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