An orgy of tandem blowjobbing, normally a sexual act pertaining to those of the homosexual persuasion and usually done in groups of 5 or more. the use of the word 'brooklyn' is descriptive of the rough and savage manner in which this act is executed.
"Dude, i went to gay hank's apartment last weekend, and we had a brooklyn blowout! i got my dick wet by 4 other guys bro!"--or--"bro, my dick hurts from that brooklyn blowout last night. Tell sneezer to stop dragging his teeth man. that shits not cool."