A Douche Ass Tool Bag.
(1) Someone who appears to be an annoying asshole.
(2) A guy who belongs to a stereotypical fraternity.
(3) A common nuissance.
"Dude, check out that guy behind you with a popped-collar, shades on at night, and his visor on backwards and upside down."
"Yeah bro, ..... total Dat B."