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A UDC (Urban Dictionary Critic) is a person who logs on to Urban Dictionary looking for a real or serious definition. When a UDC comes across a definition that contains a hint of humor, sarcasm, or bashes one of his beliefs, he will then proceed to give it a "thumbs down" and fume about the definition for hours.
Joey: Hey, so I see your Jesus Christ definition got a load of people giving it a thumbs down.

Jessica: Yeah, some UDC's just don't like the thought of Jesus not existing.
by skifreemt April 13, 2010
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Unreasonable dumb cunt

Sometimes used as udfc or simply Uc.
A semi professional way of describing and intolerable individual.
I can’t believe that U.D.C. was asking for more money, s/he did a whore-able job.
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