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

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

Ninni is the most weird girl in whole school. She get's mad really easily but also forgives easily. She has brunette hair and probably wears glasses. Ninni is not very popular, but still has some amazing friends. She is also very kind and lovely.
she's so ninni!
by gymnasticsforlife September 25, 2017

by AJ Kash August 20, 2009
