An acronym for:
Shit. Shower. Shave. Masturbate.
Used when you really don't want to say point blank what you're about to go and do.
Milloy: "I'm gonna go afk for a bit guys. Gonna go SSSM."
Milloy: "Shit, shower, shave, and masturbate."
Chris: "Oh.. ew. Now I know why you used an acronym."