Tuxxi is the name of a person on steam. He is really bad at every game he plays but pretends to be good at them. When he does bad, he starts to bitch and complain about how he hates the game. But if he plays the game and starts to do well, he will stop complaining and start saying hes having fun.
What a douche.
Tuxxi : "Man, why are you playing Battlefield Bad Company 2?
That game SUCKS!"
Normal Person : "I like it, its fun. Here come play with me"
Tuxxi : "FINE! GOD!"
Tuxxi then proceeds to bitch and moan some more. After finally stopping his bitching, he plays and has a lot of fun.