Top definition
Back Dat Ass Up

(Bee-Dee-Aye-Yoo) or (buh-DOW)

v. The act of backing dat ass up into one of your bros while they sit watching tv or playing some CoD.

Most importantly, you must shout "BDAU!" whilst BDAUing your boy.
Jimmy was just sitting there, playing some Nazi Zombies, when all of sudden Steve came in backing dat ass up into his face. "BDAU!"
by The BDAU Master Elite January 25, 2011
Get the mug
Get a BDAU mug for your sister Julia.