fiyu

a synonym such as sike or the ninety's favorite, NOT; used at the end of a statement, question, sentence, etc. to negate what was just said; usually cuts of the person responding to the statement made.

frank: this food you cooked is excellent
amanda: really? thanks.
frank: fiyu
amanda: you suck.

fiyu by Amanda Rodriguez June 23, 2007

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fiyucking niyutts.

Variation of fucking nuts. When something goes against expectation/norms/acceptability, and the phrase "fucking nuts" has been diluted from overuse, people turn to fiyucking niyutts.

This girl was masturbating on the bus. In broad daylight. It was fiyucking niyutts.

fiyucking niyutts. by Jerkworthy February 20, 2004