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Fanc is a shortened version of the word fancy. It is pronounced with a soft c at the end, contradicting the silly rules of English grammar. Saying fanc is akin to saying pant instead of pants.
Char: "Oh I'm going to a special dinner tonight for cool sciencey-type people. It's a black tie event. There will be candles and souffle."
Asya: "That's pretty fanc."

by Pooperton October 09, 2008