it stands for "talking to myself" , when that person you're talking to on-line doesn't talk, so you say ttms, so that they realise they've ditched you.
Roro: i think star wars was really good! have you seen it?
Vicky: ...
Roro: ttms ¬¬
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).