Ma bong, or Phi Ma bong, simply Phi Ma is a supernatural spirit believed by the Lanna people of northern Thailand. Its appearance and characteristics vary according to different stories. Some describe Ma bong as a creature with the lower body of a horse and the upper body of a human male, said to be the spirit of men who have never had sexual partners. Or some believe that it is the spirit of a dead horse, also believed Ma bong likes to nibble on dried buffalo heads. Others tell of it having the lower body of a horse and the upper body of a beautiful woman, who lures young men into intimate encounters before killing them.