Japanese word meaning a super human person who is male.
Also the name of the dude in urotsukidoji (a hentai movie)
The chojin is a boy who literally turns into a giant sex beast and rapes every woman he sees. In the film he actually destroys a town with his penises (thats right... plural!)
AND he is the hero of the story!
You call someone a chojin if he is very popular with the ladies (1) or gets drunk and lets his labido take control, (although not actually raping anyone or destroying any towns)(2)
(1)Lucky bastard, hes such a chojin
(2)"God man.... I got totallycrunk last night and went totally chojin! "