One who would rather be playing halo than having sex with his girlfriend (which is usually lacking anyway).
Did you see that halo dork? He had a tattoo of master chief on his arm!
by Anonymous :O December 18, 2005
A term also associated with Halo gaming through the Canadian company "dork - the Digital Organization for Recreational Killing", a group which runs professional gaming tournaments and other video game events, with their specialty being Halo and Halo 2!
That Halo dork is fragging his way to the head of the league!
by The Chief June 19, 2006