look up any word, like cleveland steamer:
 
1.
A person who spends considerable time in indoor pursuits, such as computing, sleeping and watching sports on television.
"Sean, an avid indoorsman, is highly regarded for his skill at video games and computer programming."
by Sean Boots January 26, 2004
 
2.
An Introvert who prefers video games to partying.
"What better than playing games and enjoying the luxury of your house ?" says an indoorsman.
by tramp120 November 09, 2009