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failing out big-time in trends; a retardation that makes you slip into the way of the prior generation: your parent's generation!
Ewww... the way she dresses is soooo fobi.

Dude, our band is starting to sound fobi!
by thread-in-a-rug August 27, 2009
Fear of Being Involved/Included/Invited
The antithesis to FOMO. FOBI refers to someone with a fear of being invited to or involved in social activities.
by papillonnosilla August 19, 2010