An interjection expressing extreme indifference to or disdain of another person's ideas or presence. Also can be used to express displeasure about a situation. (Note: the T and S must both be clearly pronounced.)
Creepy guy: Hey girl you got pretty eyes, can I get your number?
Steve: Dude check out my star wars toy collection!
Jenny: WTF, this bar is out of Stoli Orange?!?