Current/former Nine Inch Nails fans (hence, the "NIN" part of "ninnies") who originally met through the Net (old-school ninnies trace their roots to the alt.music.nin Usenet newsgroup, while more recent converts have been acquired through IRC, Live Journal and dating/marrying other ninnies), and who now get together periodically to consume prodigious amounts of meat, alcohol and curiously strong brownies, wear Reznor heater shirts and bondage gear, perform cutting-edge karaoke, and comandeer hotel lobbies 24/7 for shooting the bull, freaking out mundanes, making more bad in-jokes than was previously thought humanly possible, and impersonating N'Sync roadies.
by Robin the mad photographer January 30, 2005

A term that is used to refer to someone who is being ridiculous, silly, or who is slightly off their rocker. Often used affectionately.
by bits99 May 4, 2021

by Urbaaaaannnnnnnn May 6, 2020

by Urbaaaaannnnnnnn May 6, 2020

Bobert: Wow, that kid that plays runescape is such a ninny. I stole all his money, ate his girlfriend, and fed him to a boar and he didn't even think twice about it!
Sam: Hey man, wanna play some b ball?
Cheechee: Well, I uh, I kinda wanna play some more runescape.
Sam: You fucking ninny.
Sam: Hey man, wanna play some b ball?
Cheechee: Well, I uh, I kinda wanna play some more runescape.
Sam: You fucking ninny.
by Ninny Barberino December 27, 2006

by The Return of Light Joker December 24, 2007

by AJ Kash August 20, 2009
