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."
מאת CaryGrant 18 באפריל, 2011
suck my dick hoe.
person one: smdh

person two: okay!
מאת notreallyblonde 25 באפריל, 2010
Means "shaking my dick head." Used when referring to masturbating
Friend: "Hey, wanna come over?"
Me: "Give me 5 minutes... smdh"
מאת Sr_Papacito 4 בדצמבר, 2011
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.
מאת Yeeeaaah! 20 באוקטובר, 2011
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.
מאת Nate Blaze 29 ביוני, 2011
Suck My Dick Ho!
When "Shaking My Damn Head" is just not enough, and what you really meant to say was "Suck My Dick Ho!" SMDH!
מאת badboybone 24 בינואר, 2011
So Many Dumb Hoes
There are SMDH in this world.
מאת YoImCool 18 באוקטובר, 2010

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