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
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