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20.
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
 
1.
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.
by jongu January 27, 2004
 
2.
sm
Sex Machine (mostly used in chats)
- Hey, do you see Robin over there? He's a total sm.
by tingting44 November 04, 2010
 
3.
sm
a short version of sex machine
-Hey, do you see Robin over there? He's a total sm. Every cutie in the town has tried him.
by rainy day today November 05, 2010
 
4.
Sleepy Mexican Syndrome

A diagnosis for excessive sleepiness at all hours of the day
I was so tired in class I feel like I have S.M.S
by The Worldwide Indian February 27, 2009
 
5.
sm-
it is a prefix that you use to curse in school to not get in trouble
what the sm-uck (fuck) you sm-ushbag (dushbag)
by smack that all on the floor February 13, 2009
 
6.
SM
Stage manager (in a theatrical production).
Kate was the best SM so far this year.
by Margo Roth Spiegelman II May 02, 2010
 
7.
SM
Short for "Strong Mad" on homestarrunner.com.
Strong Mad: zzzzzzz... zzz..I'm strong maaad! ....i dont liike dis moovie!.....I like va cheat!... um... breaking stuff!
by Daniel December 06, 2003