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Fault Not Found - Term used by engineers to describe the outcome of testing something and not finding anything wrong.
When ringing back to base after testing a telephone line. "Yes that one is FNF"
by Slimeburger September 28, 2007
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a: Dude... I am in love with girl
b: Fnf, that girl is not worth it
by fnfouce August 27, 2010
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Man you don't date that kind of woman, she's an FNF, you know, fuck and forget.
by kcoomac July 17, 2009
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Acroynm for Fucking Fucked.
Past Tense - Dude your girlfriend missed her period. You are FNFed.
Present Tense - FNF! You missed your period?!?!?!
by Shotgun February 15, 2005
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