The ONLY decent thing on that stupid ass channel called MTV. On during the late 80's through the early 90's. Hosted by a cool person named Riki Rachtman, he'd feature kickass metal. He actually knows what he talking about. There is a new version of the show, but isn't good, or the same as the old one, because today's nu metal blows.
The old Headbanger's Ball was cool because that's when metal was metal. Fuck MTV.
A HeadBanger is a person who is a fan of alternative/heavy metal/death wave/indie etc. When listening to such music their head moves up, and down to mimic the beat.
Usually wants to be a non-conformist; Not following the "herd".