(SOM) Stands for The Sons Of Mayhem MC, The best 1% MC in GTA there ever was or will be, They are said to have derived from the outlaw Gangs back in the 1800s.
If you see them... Keep clear!
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 jellymess of s.o.m.a.!
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.