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To be in denial when it comes to someone being Jewish, or being of Jewish decent.
Brandy: John Mayer is not Jewish!

Brittany: He totally comes from Jewish decent, I googled it. You're obviously in Jewnial.
by Brittany woohoo! July 07, 2009
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When someone denies that they are Jewish but they engaged in daily activities that clearly lets everyone know that they are a Jew.
Brian is in such Jewnial. He tells me hes not Jewish yet the other day I caught him walking down the street looking for discarded pennies and crying while reading Anne Frank.
by CARTMAN November 12, 2014
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