SMDD stands for "Shakin' My Damn Dick!".
Slime: Where did yo bad bitch get that Trukfit shirt?
Me: From SMDD.
by Ray J the Great December 04, 2012
Smdd is a abbreviation of the phrase "Suck my dogs dick"
Guy1: Your a noob.
Guy2: SMDD!
Guy1: What does that mean?
by Werfer July 10, 2011

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