unf unf 

The sound of humping.

OMG, that chick is so hot! Unf! Unf!

unf unf by Mary Anarchy February 25, 2004

unf unf unf 

The universal noise of fucking.

Claire: I've been here the whole time.
Claire: unf unf unf

unf unf unf by prollygon August 22, 2011

Pak Chooie Unf 

Code programmed into and executed by space robots, usually the pusher or shover models. Often spoken aloud by said robots, often reduced to simply "Pak Chooie".

"PAK CHOOIE UNF
I am a Pusher Robot.
DATA: To start fires
TARGET: Grandmother
DATA: Lies
PAK CHOOIE UNF"

Pak Chooie Unf by Deomatrumus November 10, 2008

unf 

Universal Noise of Fucking. See above definition for onomatopoeic use as a sound itself.

unf by Video Warrior Laserion December 14, 2002

unf 

A term used to express sexual desire

Unf that guy is so HOT!

unf by Hella cool April 18, 2014

Unf 

Common word used on Tumblr when seeing a hot person.

hot.
UNF

Unf by hookerific August 23, 2011

unf 

Universal noise of fucking. Also used to describe someone attractive.

Damn, Alex Gaskarth is so unf.

unf by wtfamisupposedtoputhere? October 22, 2011