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Undercover Bagel, or "UCB" for short, is a term used for a jewish person with a non-jewish sounding name.

Not to be confused with "Pizza Bagel" - a person that is both jewish and italian.
Did you see the size of John Smith's nose?
He's an undercover bagel.
Oh, that explains it.
by Colt Mcforties October 18, 2007
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