Niff 

Nick and Jeff Warbler's (from Glee) fandom-made couple name.

Person on livestream: Do you ship Niff?
Nick: ...*huge smile*

Niff by GeeUrie March 22, 2012

niff 

boolean inverse of the function iff, equivalent to xor
same as nand or nor

0 niff 0 =0
1 niff 0 =1
0 niff 1 =1
1 niff 1 =0

niff by geek_1024 October 6, 2012

Niff 

Niff is a street name for poppers.
also used for sniffs,

pass me the niff mate

ive only had 3 niffs

Niff by agatha chris June 15, 2009

niff 

Everything and anything and everything inbetween!

I'm just a stupid niff!" "I will niff you." "Get the niff outta hurr." "Niff you n-n-niff you!" "Written in the niffs!" "Niffy niffs!" "Stroke a niff." "Rollin like a big niff.." "MLIN" (MY LIFE IS NIFF

niff by Nifferologist! October 28, 2011

niff 

an abbreviation for niffler. its derived from the creature in harry potter which sniffs out gold, but it simply means "nothing" or "nevermind." see niffler

Dude 1: what's that your hiding under your bed, d3wd?
Dude 2: niff.
Dude 1: ok, if your sure.
Dude 2: just forget it, man.

niff by forearm October 28, 2005

niff-naff 

afro-american riff-raff

I don't drive down there... its full of niff-naff.

niff-naff by red-eyed vomit eater December 16, 2008

Niff 

A shortened version of the word "Niggerfaggot"

omfg, you are such a niff

See also pineapple

Niff by littlepancake April 25, 2010