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23.
Sm
Being a "Sm" is basically being awful at every game you play. This also includes swearing extensively while dying in a FPS. This is named after a particularly bad player at Halo 2, Halo 3, and Call of Duty 4.
WOW, you're just another Sm.
by Likwidddd March 08, 2008
 
15.
SM
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!
by silverarrow24 January 12, 2006
 
16.
SM
These letters are an acronym for Search Me
Until the IRA declared a ceasefire SM was said by thousands of people travelling from Belfast City Airport, Belfast International Airport, the ferries sailing from Larne or Belfast and all the people entering Belfast city centre through the security gates .
by St. Ias September 25, 2005
 
17.
sm
Self mutilation. When someone physically injures themselves to rid or relieve themselves of mental pain.

A highly addictive practice, as when the body is physically injured it releases endorphins into your brain and blocks mental stress. Similar to the "high" you get after virgerous excercise.

Just because you sm doesn't mean that you are suicidal, or have any wish to die whatsoever.
A very common and usually well hidden practice.
by Sally the Ragdoll February 26, 2005
 
18.
sm
Abv. for Sales Mark.
The logo has a SM at the right.
by Scratch DJ February 04, 2005
 
19.
SM
abreviation for San Marcos! the pimpest city in san diego. 760 represent!
wadup wit you cuz? SM da shit, everyone know. NO.C.SD aLL dAy!
by 760 ALL DAY January 22, 2005
 
20.
SM
stands for SELF MUTILATION and is also known as self-injury. (cutting or burning yourself. doesn't mean you're suicidal)
She does SM.
by Anonymous October 24, 2003
 
21.
SM
(SMiling Mentally)
We ALL know that even though what your friend said was 'sooo' funny and hilarious you want to say lol, lmfao, lmao, lmbo, or in retarded cases ROTFLMAO but here is the REAL joke was it really so funny that you were LITERALLY laughing and rolling your INSEPARABLE "butt" off? NO. So i created a more SMARTER way of saying "lol."
- Laughing without actual outbursts.
- Especially in a quiet place maybe church or something.
-Today i farted in class, everybody ran out when they smelled it
-SM

-That joke was real funny SM im at an assembly

-What you said wasnt funny enough to laugh out loud but i dont want you to feel bad SM
by JJadeNM January 22, 2010