One who lives in there parents Attic/Basement Playing video games and spends his or her time on the computer. Epically on Wikipedia. The games the attic dweller might play may consist of World of War craft or the large selection games of Valve.
Person 1: Wow Omar spends all his time playing video games in our parents attic, hes a complete geek.
Person 2: You mean a Attic Dweller.