An emoticon that represents an asian person crying. The top of the T's are eye slits and the stem of the T are tears streaming out. The period is of course the nose.
This is commonly used in online games (such as Warcraft) by a player when something goes very badly or unlucky for that player.
<Player B gets lucky and kills all of Players A's units while Player A does not noticed>
Player A: T.T
Player B: Yeah, I can't believe you didn't see me.
17 Avqust 2004