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1.
A loud, unclassy, obnoxious man. Often seen travelling in packs and sporting popped collars, the term for this typical male species is coined from the way they can be heard constantly uttering the words "Yahh dude..."
The bar was great last night until a bunch of yadood's came in yelling and ordering round after round of jaeger bombs.
by Jennifer Leigh March 25, 2008
 
2.
Sarcastic expression meaning "your an idiot"
Guy 1: Oh man i wanna go Bang some hoes tonight!
Guy 2: Ya Dood
by Johns Creek February 03, 2010