#bdb Share definition Flag A Bad ass Stud who's first initial is "B", and has a impossibly long penis. "Wow look at how many bitches #BDB can fit on his dick"! "I know, i wish my dick was as big as BDB's." #bdb by 69the69truth69 November 18, 2014 0 0 Get merch Get the #bdb mug. Buy Now — $32.95 See more merch