Awesome name and avi. Anyway, I usually say it when i'm winning just to get the sore loser to chill out lol.
Some people do. Not everyone is a sore winner.
I guess winning makes some people feel good about themselves. Those are the real losers wasting time working instead of enjoying a frackin' game.
That line is for satisfaction not for celebration !!
Same reason people only complain about dirty fighting if they're losing. Or honor. People always want to pin their defeats on something other than themselves.