1 definition by YaaIST
An expression of utter and consummate excitement.
It is more powerful than other generic expressions, such as "hooray" or "yay".
It is more powerful than other generic expressions, such as "hooray" or "yay".
Alex: We just finished all of our tests!
Brandon: YAAAAAAAAAAAAAAAA
Alex (joins in): YAAAAAAAAAAAAAA
Brandon: Can't wait to next period!
Alex: What's that?
Brandon: IST! IST! IST!
Alex: YAAAAAAAAAAAAAAAAAAA!
Brandon: YAAAAAAAAAAAAAAAA
Alex (joins in): YAAAAAAAAAAAAAA
Brandon: Can't wait to next period!
Alex: What's that?
Brandon: IST! IST! IST!
Alex: YAAAAAAAAAAAAAAAAAAA!
by YaaIST March 30, 2010