Top Definition
Forgetting that you are not a F.O.B. (fresh off the boat) and slipping in a non-English word in your vocabulary.
"Thanks very much for calling Mrs. Smith, have a great day. Okay, Yallah bye." Friend "Wow! you're such a FOB!" In defence, "I'm sorry it was just a slip of Fobnesia."
by Coptic Damo July 28, 2009
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