Joshoon

A person (typically male) with very little self-control, who lashes out in crazy ways. Joshoons are frequent receivers of restraining orders and Cease and Desists. And are a hindrance to any woman who breaks up with them, all waitstaff, and everybody in a Facebook comments section

“Dude, did you hear those crazy tapes of Mel Gibson losing it on his ex-wife?”

“Yeah, man, he’s a total joshoon.”