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1 definition by r johnson

 
1.
A rider of a 4 wheeled ATV (Quad) who behaves like an idiot.
A quadtard is a drunken, helmetless quad rider. Normally found riding way too close to vehicles and campsites, spinning tight circles making huge clouds of dust, usually while wearing a wife-beater tanktop and a backwards baseball hat. Often holding a beer while riding, and never more than a few feet from a large cooler full of cheap beer.
by r johnson December 12, 2007