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Verb

To Neff (eg Neffing)
Neffer (one who neffs)

To neff is to post uselessly in order to increase one's post count in an online forum.
Someguy: posts funny story about his girlfriend
Neffer: lol!!
by airencracken June 04, 2006
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15
THE SOUND A HOMOSEXUAL MAKES WHEN EJACULATING INTO ANOTHER MAN'S ASS USUALLY FOLLOWED BY A SMILE WITH HIS TONGUE OUT
NEFF IT FEELS SO GOOD TO CUM IN YOUR ASS
by BALLS MAHONEY October 08, 2012
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16
To shove one's fist up another's ass. Also known as "fisting".
"I was neffing the wife last night, and she shat on my arm!"
by wazzledoozle September 05, 2006
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17
a straight male who hangs out with all the hot girls but never gets anything from any of them (often refered to as the bestfriend)
situation 1:

guy 1- hey dude im goin to the movies with a few girls tonight...

guy 2- nice man, yougonna get any?

guy 1- probibly not

guy 2- dude dont be such a neff

situation 2:

chick 1: im thinking about going out with tyler

chick 2: ew no, hes just a neff!
by nathaniel bangem March 26, 2009
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18
A "Dickey Word" of complex origin.

It Branches from the root word Neffertiti. Meaning a person of physical or mental disability.
Tina Demps is a Neff.

Hey ma is it just me or is that a Neff licking the sofa.
by steveclaiborne(aka.ma) September 03, 2010
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19
Neffs are strange creatures. They like to nap and have 'snackies'. Neffs can be affectionate, but be careful as they do have a tendancy to bite on occasion. To make a neff happy, feed her snackies, let her nap and give attention. Neffs do lack the ability to think before they speak, so if your Neff says something mean, just give her a snackie and send for nap immediately.
'Neff just bit me, she needs a snackie and a nap'
by Neffneff March 31, 2020
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20
Never ending fuck fest: An absolute mess, where everything goes wrong and everything needs fixing all at one time. And just when you finish, something else goes wrong.
Friend 1: How’s the renovation going?

Friend 2: Second floor, needed to be remodeled in order to finish the first floor kitchen ceiling... it’s a never ending fuck fest with these 150+ yr old houses.

Friend 1: Wow, yep, classic N.E.F.F. (*Never ending fuck fest.)
by OzziLeprechaunYanky April 16, 2021
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