. Accronym for "Universersal Noise for Fucking"
particularly heard during intercouse when the female moans but bites her lip to silence herself. "unf" heard as "uuuuhhhfff" or "ooooouuuhhhnnnnnfff"
"all that bitch could say was unf"
Universal Noise of Fucking. See above definition for onomatopoeic use as a sound itself.
Common word used on Tumblr when seeing a hot person.
The noise that the Doom guy made when you tried to 'open' a wall like it was a door. uNF uNF
uNF uNF uNF uNF oh shit, this is a wall, not the door leading to the floating eyeball.
Universal noise of fucking. Also used to describe someone attractive.
Damn, Alex Gaskarth is so unf.
Same as, "blown". Origin: The sound a guy makes when he cums.
"Unf, I have that paper due in two hours and I haven't even started."
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.
When purchasing screws be sure to specify the thread type UNF as opposed to UNC