Noun
English Wikipedia has an article on:all-terrain vehicleWikipedia
all-terrain vehicle (plural all-terrain vehicles)
A motor car or motorcycle that is designed to operate on rough ground, and is not necessarily street-legal
Staff Sgt. Joseph Kellogg and Sgt. Cody Grant provided life-saving actions to a 12-year-old victim of an All-Terrain Vehicle accident. Source: Internet