The human male member that rests between the thighs. Another name for your crank, rod, penis, cock, dick, scrod, junk, pecker, diggler, meat, goods, wang, prick, schlong, johnson, boner, dong, jimmy, etc.
As the Beastie Boys have said: "My fuckin' BOZAC, y'all!!"
(1) Apparently a form of "Druid Diallect" which refers to a man's ball sac
(2) Man girl, you ain't got no bozac
"Does anyone in the GWF have the BOZAC to step up to Druid's challenge"
"LOL Bozac, my little brother says that"