15
stands for "Shaking My Head" usually an acronym when you see the most ignorant, dumbest, or disapointing shit you've ever seen, you can say it rather than doing the the action
"you see that 16 year old over there?"
"yeah"
"that baby tee's way roo small for her, and she's preggo's"
"what's that in her mouth?"
"omg that's a blunt"
"seriously SMH"
by aemy April 16, 2010
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16
An annoying and over-used initialism (not an acronym) meaning "shaking my head" or "shake my head".

It is used by idiots when they think they are "winning" an argument on the internet, but are actually just spouting incoherent nonsense and calling other people idiots without any evidence.

Yeah, you've met that guy, too, haven't you?
Guy 1. The holocaust dident happen!!!1
Guy 2. Pfft, where's your source?
Guy 1. Fuck u your an idoit every1 nos tht the holocaust dident happn if it did thn how come there are jews alive 2day HMM?? smh
by B1KMusic October 22, 2014
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17
widely known as an internet acronym for "shaking my head".

a less known version that exists is "so much hate".

the second version is also acceptable when used in a sentence, although the person you are talking to may be confused and think you mean the first version
person 1 "he got in a fight with that dude cause he didnt like his face"

person 2 "smh" (both correct in this case!)
by hihater14935809 December 16, 2009
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18
Shake My Head
Goes well with closed eyes, making tsk sounds, and snickering in a smug manner
DAMN THAT SNOOP DOGG USED TO BE A GANGSTA....NOW HE IS MAKING MUSIC WITH PUSSYCAT DOLLS AND JUSTIN TIMBERLAKES?? SMH
by BOSOX2007 December 27, 2010
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19
I'm tired of all of this lying. SMH.
by tilleywacker44 February 17, 2012
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20
Acronym for "Scratching My Herpes". After typing out a long, misspelled, grammar-poor, and useless Facebook status update, Tweet, Instant Message, Etc., sometimes herpes tend to flare up, and as such they must be scratched.
OMG I just saw the best movie LOL the vampier totally fell in love with the girl from the bookstore but she alredy had a bf who was a wherewolf OMG I can't wait for the sequel but why does it have to take too years to make SMH
by TTH65 September 16, 2011
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21
meaning, "shaking my head", smh is typically used when something is obvious, plain old stupid, or disappointment.
You don't know what smh means? smh
by clairekennedy04 March 26, 2017
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