A person who doesn't get out much or at all. Very commonly a gamer. Can also be a person who simply feels like he/she doesn't really add up with people.
Person: You need to get out more, you're such a cave dweller!
Cave dweller: Whatever... *proceeds to play Dota, lol and wow*
Cave dweller: Whatever... *proceeds to play Dota, lol and wow*
by Philosoraptr June 07, 2015
DON'T PUSH THE RED BUTTON!
by Philosoraptr September 01, 2015