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1.
An acronym which is a variant of SMH; it means "shaking my damn head."
Paris Hilton was released from jail after three days, SMDH.
Beküldő: Metaview 2007. június 22.
 
2.
An acronym standing for "shaking my damn head"; usually typed on blogs or in text messages to express disappointment, sadness, disgust etc.

Also known as SMH standing for "shaking my head"
"I hate to see really fat people try to wear too little clothes." SMDH
Beküldő: Mrs. Judy 2009. március 24.
 
3.
An acronym which is a variant of SMH; it means "shaking my dog's hand."
Whenever someone types "SMDH," I assume they mean "shaking my dog's hand." Aw, cute dog!
Beküldő: turncoat 2014. május 5.
 
4.
This is an Acronym that originally meant "Silently Masturbating During Homework". It was converted into "Shaking My Damn Head" when a Facebook member who often used this term was asked, "What does that mean?". The individual responded with a quick and witty answer. "Shaking My Damn Head". The individual who asked what SMDH means responded, "You sure do shake your damn head a lot".
Beküldő: AnwarSadat94 2011. május 14.
 
5.
originally meaning, "Silently Masturbating During Homework", smdh now means "Shaking My Damn Head". You could argue it still means the same thing.
A: I always smdh, especially when studying for finals
B: oh, you shake your damn head cuz studying's so stressful.
A: um, sure, lets go with that.
Beküldő: Yeeeaaah! 2011. október 20.
 
6.
SMDH is an acronym for, "Shakin' my dickhead." Used when you witness an event that leaves you speechless. Or used as a follow up dance subsequently after the helicopter.
Example1: I saw this guy driving down the wrong side of the road today. Smdh shakin my dickhead

Example2: I got out of the shower at my girls house. She was watching american idol in the bedroom. So I stood in front of the tv, dropped my towel, smdh shakin my dickhead and broke out the helicopter on her.
Beküldő: Nate Blaze 2011. június 29.
 
7.
It means "shake my dick head". But you also have to say "SMDH at you," otherwise, you would just be shaking it for no apparent reason except to get off. So, it basically means the same thing as the original except more of a tisk tisk with exposed genitalia.
Dude 1-"Man, I lost that chick's number from the other night!"
Dude 2-"Sigh...smDh at you."
Beküldő: CaryGrant 2011. április 18.