Such that. Commonly used in the field of mathematics and less so in science. It demonstrates that a condition is necessary in a cause-and-effect manner.
Stacey dawned a heavyjacket s.t. she could better handle the torrential downpour on her way to the market.
casual abbreviation of the word "something" which allows you to use it as a verbal tic without experiencing the shame inherent in actively typing 9 whole letters to prove how inarticulate you are
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).