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1.
smh
Acronym for 'shake my head' or 'shaking my head.' Usually used when someone finds something so stupid, no words can do it justice. Sometimes it's modified to 'smfh' or 'smmfh' by those that prefer profanity in their internet acronyms.
trick1: i got a headache...i hit myself in the head with my knee while trying to do situps.

trick2: smh
by trickologist February 14, 2004
 
2.
SMH
The internet acronym for the words 'shake my head'. Usually used when disappointed in someone/something.
Vincent: So how was prom?
Peter: It was great!
Vincent: You dance with alotta girls?
Peter: No. Just went 'meow meow meow' the whole time.
Vincent: SMH
by Photik May 16, 2006
 
3.
means shaking my head. abbreviated
he did not just wear that shirt S-M-H.
by babyG s'rah August 12, 2006
 
4.
SMH
1) Shaking my head
2) Sydney Morning Herald
You read the SMH? SMH
by 1melblad25 February 21, 2014
 
5.
smh
SMH is an acronym meaning "shaking my head." It is an expression of un-verbalized contempt, used by people highly contemptuous of the world but too stupid to be able to express their disgust in actual words. It is, essentially, the grunt of the ignorant cynic.
Person 1, not a libertarian: Libertarianism is the political philosophy of toddlers. It is the ultimate outcome of a mindset centered completely on one's self, and ignorant of the existence of other humans.
Persion 2, libertarian: Dude, you just don't get it. SMH.
by UrbanPat October 27, 2013
 
6.
smh
An Internet acronym used in text (SMS) messaging and in social media posts such as appear on Twitter and Facebook. Although many people believe it stands for "shake my head" or "shaking my head" (as in disbelief or disdain), the true meaning is "so much hate."

However, due to the widespread use of "smh" from those who have learned its meaning incorrectly, it can be assumed that many who use it do so in the erroneous meaning of "shaking my head." It can usually be read either way.

"smh" is similar in meaning to "fml", but more angry than despairing.
"My little brother keeps telling everyone he'll be able to play in the Super Bowl next year, and he's only fourteen! smh"

"The government has instituted a new tax on, get this, twisty-ties. smh"
by JollyK February 15, 2012
 
7.
Smh
Smh stands for "Shake my head". It also stands for "So Many Haters" with in that case it could stand for many things
Like OMG!!! Smh on my instagram.

Smh wtf am I looking at?
by 15 Tiers Of A Relationship May 27, 2014