Someone who exhibits lame tactics in competitive
sports video games, usually against a
human opponent. This could include but is not limited to running the same play over and over, using
clock tactics, or anything else that isn't in the spirit of friends sitting down to waste time playing video games.
Player: "Man you're
milking the clock in a video
game? That's fucking twatballing, man"
Player: "Quit pressing pause in the middle of my
play, you fucking twatballer"