Bud is one of the dumbest persons to have ever existed, he is a prime example of a cotton-headed ninny muggins.
by PhoenixGamer34 December 24, 2021

A childish, non-explicit word for boobs or breast. My mom’s friend got breast cancer (and lived, thank goodness) a few years ago and all 4 of her kids went around telling everyone that their mom had ninny cancer.
by somethingforyourmind February 16, 2018

by Cheerios4ever October 26, 2020

An expletive used in response to another person attempting a 'mansplanation' of the difference between ASTROLOGY and ASTRONOMY. Frequently used to interrupt long supercilious diatribes on science, the occult, and the distinctions between them, .
T: "You know, there is a big difference between astrology and astronomy! Star signs are part of astrology. Astronomy is..."
M interrupting: "Astrology, astronomy - what is the difference?"
T: "There is a big difference. Astronomy is based on science. Astrology and star signs is not but rather..."
M shouting: "ASTRO-NINNY!" End of the conversation.}
M interrupting: "Astrology, astronomy - what is the difference?"
T: "There is a big difference. Astronomy is based on science. Astrology and star signs is not but rather..."
M shouting: "ASTRO-NINNY!" End of the conversation.}
by Sleap Reeder June 9, 2022

Forgive me mother and father, for I am just a simple silly-willy Ninny-Man, I shan't leave the dog in the hot car the next we have ourselves a family pet.
by random_male_seeks_meaning July 25, 2018

Nangu Ninny aka Anny is One of the most beautiful girls I've ever seen. She always wanders Nangu in her room, she never wears any clothes when her boyfriend Prateek is around her.
by Anantarya2 September 24, 2023

by black blue an March 10, 2022
