"According To Face Book." Learning information about others via facebook.
ATFB Heather and Tim just got engaged.
ATFB Pete got caught last night drunk robbing the neighborhood.
a shorter version of "According to Facebook"
often said when speaker does not know for sure, but saw it on facebook.
Becky: atfb, Josh and Lorraine are dating.
Ashleigh: They're not serious! They're just good friends! atfb, you're wrong.