An abbreviation for the instance "Scarlet Monastery", a dungeon in the game World of Warcraft. Usually used by player looking for people to group with. The instance is separated into four parts, the Library, the Armory, the Graveyard, and the Cathedral.
Hey, let's get a group and do SM!
LFG PST SM ARMORY!
Stupid noob, you are too much of a lowbie to do SM!
The abbr. of Sado Masochism. A sexual act involving two or more participants whom having overwhelming amount of desire to either sexually torture others or be sexually tortured by others. Also associated with BDSM.
My friend had went to a SM party last night; that's why they stayed home today because it is a tiring activity.