a person who is clueless and utterly idiotic. A person who makes mistakes alot.
Tiffany made another stupid Mistake. tiffany must be such a Ninny!
by PedroBoy October 25, 2010
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A shorten version on Ninconpoop. "Ninny", is used in "Hey Arnold!" and "Rugratz". "Ninny's" most of the time have brown hair and some have double chins. "Ninny's" are laughed at, not with.
"Your a Ninny!"
by Tommy234 February 5, 2011
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Ninny is a pussy bitch, named fincher from the website wireclub. It means he has a vagina and licks his own ass as a means of taking showers. Sad
me: "Fincher you fucking Ninny"
fincher: "Im so ashamed"
by Spencer222222 July 21, 2011
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1.)A title reserved for people that have a defined humor style.

2.) A person that likes to use "that's what she said", and or, "Your mom jokes" frequently.

3.)Any female or feminine male.
Dang Katie, You are Such a ninnie
by ChrisPBaken November 3, 2010
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