A mad or eccentric person.
One who dances by violently shaking the head in time to the music.
A kind of chin-up or pull-up exercise where the head is kept in line with the bar.
One who enjoys heavy metal (rock) music, to which this sort of dance is usually performed.
One who behaves in a crazy manner.
A pitch thrown with added pressure by the index finger and a twisting wrist motion resulting in a motion to the right when thrown by a right-handed pitcher.
Crazy, offbeat, bizarre, zany, or weird.