Top definition
Slang for notification on the social-networking site Facebook.
Oh you commented? Facebook didn't give me a niffy!
by ZakkyChan December 07, 2010
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2
Resembling the characteristics of today's most debonaire gentlemen. Similar to player or pimp.
That was pretty niffy.
Way niffier than Brad Pitt or Johnny Depp.
by Jasmine Morris May 30, 2005
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