A hand or finger tendon that gives a player the quickness and flexibility to master video games, especially games that require great dexterity and precise button pressing sequences.
by Soleijhee January 03, 2009

A chronic painful condition that effects the muscles or joints in the hand, fingers and/or forearm after playing videogames too much.
Dude, I played Final Fantasy for three days straight, but my Nintendonitis flared up so I couldn't play anymore.
by Aeronius July 21, 2008

The cramp you get in your hand from playing video games, especially between the thumb and forefinger.
by hkmtbr December 17, 2008
