For all of you vulgar people it can also mean the abbreviation for Unified National Fine (as in thread of a mechanical device that has a spiral groove cut in it for holding and fastening things together, most times called a "screw" that has no connotations to vulgarity.
by 1ofmanytoo July 12, 2011
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Get the unf mug.unidentified nocturnal fornication
by fireball4u January 4, 2005
Get the unf mug.Any sort of vigorous sexual intercourse. "Unf" being the sound one might make, as in;
"Unf unf unf..."
"Unf unf unf..."
Brian and his boyfriend were unfing in his car like the whole time; I only saw them at the end of the night.
by mini-taur August 10, 2016
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