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Someone who initially appears intelligent but is found to act idiotic in the majority of situations.

A Niddy will - act without thinking
Ask the same question more than twice
Not be able to see something directly in front of them
Have a terrible memory
Be extremely clumsy
Overuse telephones
Think that sarcasm is wit

Under no circumstances can a Niddy multitask nor even think and speak at the same time.

Can also be used as an alternative monika for males named 'Christian'.
"OMG, he's such a Niddy! Even though it's cleary written on the packet and I explained it to him 6 times, he's still eaten the bar of laxative chocolate! Niddy!"
Niddy by bighobo February 7, 2010
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An intelligent person who will act upon a problem and resolve it.He is a king with no fear making sure that all his people are safe .He is also known to have a massive dick and gets all the ladies in town.
Wow!Hes so cool.That guy is A fucking niddy
Niddy by Lolz57 September 14, 2018
Related Words

niddy noddy 

the act of fornicating while wearing footy pajamas

A small penis
They were busy doing the niddy noddy last night and couldn't come to the movies with us.

Nah I didn't do him. He has a niddy noddy.
niddy noddy by whatnowbtch April 12, 2010

Niddy Tiddy 

Hairy boobs or a hairy chest
Josh: “Yo I heard Max has niddy tiddy (titties)!”

Peter: “yo that’s sick!”

Niddy Van 

That more gay than Niddy Van
Niddy Van by Eggalin November 21, 2021

noddy land 

An australian slang word meaning "to go to sleep" or "dreaming"
"Mate I'm tired, I'm off to noddy land"

"Get the couch ready cuz if I'm having custard with that Christmas pud, I'll be in noddy land by 2"
noddy land by Me'ol'ducker February 2, 2019
Head, Brain, Top, Hat, Uck, Ucky, BJ. Term Invented By A.M (410).
"Girl tried to off her skirt clearly she lost her mind, Bitch I want Noddy said it like a hundred times" -AtotheM 41Circle
Noddy by Y.BrixtonFrog February 12, 2017