cager
n.— «In the Streetfighterz Web chat room, a handful of postings scolded motorcyclists for harassing other motorists. Others, however, congratulated those bikers who confronted the “cagers,” another word for car drivers.» —“Daredevil riding takes an ugly turn, police say” by Shane Graber, Jeremy Kohler St. Louis Post-Disptach (Missouri) Nov. 5, 2007. (source: Double-Tongued Dictionary)