Top definition
the alternate word for facebook, as many people use the social-networking website as a fact-checker.
Kaitlin: Are Zach and Liz still together?
Kelsey: I'm not sure... check factbook.
Kaitlin: ..oooh it's COMPLICATED.
Kelsey: Fair game. GET ITTTT.
by KELSCULLHAAII April 14, 2010
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