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"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.
by Pinda Larker December 24, 2009
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Oct 3 Word of the Day
I couldn’t care less (but one must keep up appearances, right?)
Frenemy has a family tragedy. "Thoughts and prayers."
by November 05, 2018
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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.
by Facebook Addicted December 13, 2009
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