Unf

Common word used on Tumblr when seeing a hot person.

hot.
UNF

by hookerific August 21, 2011

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."

by Awesomenesssss213 March 05, 2012

Unf

A virginal, completely stupid onomatopoeia that teenage girls use to show that they are dry masturbating through their pants to photos of hot men online, mainly on Oh No They Didn't!.
Girls, if you find him truly hot, use the word SHLICK instead, it's sexier.

UNF he's hot

by 207shawdy March 07, 2009

Unf

unf·
.v. unf, unfed,
To hump in excitment; to make weird facial expression.

1. can she.. hell ya... shes a great unf
2. unf on baby! unf on!
3. but you unfed
4. whos unf'n
5. keep on unfin' in the freeeeeee woooorld

Synonyms: Boh!, Fuck, Hump

by Mike & Sarah July 09, 2006

unf unf

The sound of humping.

OMG, that chick is so hot! 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

by prollygon August 19, 2011

unf

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

by Video Warrior Laserion December 14, 2002