1. origin: from Mongolian title "khan" designated for rulers of the nomadic nation
i.e. Ghengis Khan, one of the greatest Mongolian leaders who led his people to conquer nearly all of Asia and East Europe

2. a crazy mofo known primarily for his God-given abundance of hair which is sometimes referred to as a bird's nest and his erratic, insane behaviour such as riding trolleys down half-pipes.

3. someone who does crazy stunts that no one else would do without payment.