when cornrows go bad: the hairstyle worn by devotees begins to look less fierce and more like the balding treads on a fading car tire.
Allen Iverson's hair looks treadheaded.
by misosoup January 30, 2007
Someone who avidly enjoys watching Motocross. The term has also been used to describe "cheap seats" at Motocross events. ("Treadhead seats")
Jake has been to 12 Supercross events! He's a real treadhead!
by MustangGT September 25, 2005