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.!