When something is official on facebook. Can be exclusively offacial, or as an addition to common knowledge.
Andre and Emma are offacially an item now.

Hudson has offacially come out of the closet.

It's offacial: Jenna puts makeup on her baby.
by You Bromee July 22, 2010
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Verb- To make a relationship official via Facebook.
Person 1: Hey I heard you and Amber are going out
Person 2: Yeah, it's getting pretty serious, I think I'm gunna Offacialize it.
by zagoo July 18, 2008
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