its a txting emoticon represeting an eye roll... can be either 9.9 or 6.6 or for a complete eye roll 6.6 9.9 or 9.9 6.6
Metallica freak #1: i went to go meet METALLICA yesterday
Metallica Freak #2: watever dood 9.9
A kitty face crying tears of awe.
Idiot #1: Have you heard Sakura Drops by Utada Hikaru?
Idiot #2: I have now =9.9=