This means "You sure do shake your damn head alot." Was found on the definition of 'SMDH' Aka:"Shaking my Damn head."
Guy: "Wow I'm so in love with this chick, OH I MEAN CHICKEN YEAH I MEANT CHICKEN"

(Instead of face palming you could say:)

Girl: "SMDH"

(And He'll say:)

Guy: "YSDSYDHA"

(Thats when you facepalm.)
by Your Mother is in my bed. December 14, 2012
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