S.A.W.F. stands for 'Super Awesome Winky Face' ;D
Commonly used during textual conversations, such as in IM or while texting, to express a sense of excitement (usually about something suggestive).
Half winky face + Half excited = ;D
Natasha: "OMG .. Xavier has such perfect skin & hair! He should TOTALLY be a model!"
Annie: "OMG I know right!" ;D SAWF