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
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
A person who is fond of or has a fascination with armored fighting vehicles.
Joe went crazy at the Imperial armor museum when he saw the German tanks. He's such a treadhead.
by jmt_tx May 14, 2009
Getting head while running on a treadmill.
Yo bro, I got the best treadhead yesterday.
by Bigyotaman April 24, 2015