It comes from teh popular term, BDUSSY. Which is the smell of BOOTY, DICK, and PUSSY.
So basically if the smell of BDUSSY is so intense, its a BDUSSY BOMB
"Aww snaps, it hella smeels like someone dropped a BDUSSY BOMB in there"
"bill was experiementing with hot carls last night and now is whole house smelles like it was hit by the BDUSSY BOMB"