A random term often used in many games such as the Warcraft III game, DotA (Defense of the Ancients).
It is usually used after getting killed and/or can be used as an accusation that someone is hacking, cheating, exploiting or playing unfairly in the game. (e.g. maphacking)
Tatsumaki has activated anti-hack. Their may be some brief lag for a period of time and any players who are hacking will be removed form the game.
A fun way to say "Oh my God" Some people find it annoying, which makes it even more fun to use. Some people feel it's using the lords name in vain, but as you can clearly see it's spelled gawd, not god, so no, it's not taking his name in vain.