Sth

[Becky]

snn, sumthn, somethin, something

[Little_Girl]

Sth. Sorry to hear

[Britney]

Some Thing Hot

[Mark Zuckerberg]

Sexually Transmitted Hair. When youre sexually active and a hair from your partner rudely infiltrates your mouth like an in-law.

[Tanya Shivari]

STH, smashed the homies is a term used to describe a girl who had [sex] with some of your friends.

[Little_Girl]

A clan from Guam, StH stands for Support the Habit.
They play various games including the map variant DotA of WC3, Call of Duty 4, and Gears of War, then occasionally Halo 3.
Members of this clan add the clans name to the beginning of their gamertag.