yuuaaa Share definition Flag slang expression made popular by song "Crank Dat Soulja Boy" by Soulja Boy. usually accompanied by one of the crank dat dances. 1.) "watch me yuaaaaaa on dat...!" 2.) Crank dat Yuuaaa 3.) "Yuuaaaaa!!...crank dat soulja boy!!" yuuaaa by YanniLani October 12, 2007 0 0 Get merch Get the yuuaaa mug. Buy Now — $32.95 See more merch