The phrase sometimes yelled by a male during a sexual act where he is ejaculates onto the female's chest.
Furthermore: the stated male should be called Bazooka Joe for the remainder of his life
Sally: hey Denise! how was your night last night?
Denise: preety good, except for one thing...
Sally: what was it?
Denise: well this guy yelled BAZOOKA JOE! when he came on my chest