Niasin 

The combination between 2 South African words the one
:Naai: A Idiot or Pussy
And the other

:Vesin: A dumb person with no common sense

Yoh that guy is so Niasin

Niasin by YoMaSePoeding April 30, 2021

Niagina 

The point where a girl is SO wet that her wetness is comparable to Niagara Falls.

Mitch: Dude I just preformed a magic trick for that girl over there.
Nick: She must be so niagina right now!

Niagina by Cock-a-hoop August 20, 2016

Niacin 

A natural Vitamin B supplement. Often taken to flush THC out of the body.

Dude, I have to go buy some Niacin so I can pass the drug test at Target.

Niacin by KevinStrudz August 1, 2011

Niasia 

Niasia is the pure meaning of beauty. This means no matter you look at personality or appearance, or even the way a Niasia puts a lot of people over herself. The only flaw is Niasias like to chase bad boys.

Dude 1: "wow, who is that girl"

Dude 2: "Cmon, you couldn't reclgnizs that she is a niasia?"

Niasia by Anonymous_50 February 25, 2015

nmasinachi 

A very simple girl, mostly fair in complexion and very beautiful. She is usually Igbo, God fearing and has a large heart.
Nmasinachi's can be a bit shy with u at first but gets crazy when she gets used to you.

They are too money minded, and have got big dreams ahead
Lastly they are very playful witty and jovial, but detests been taken for granted. Avoid pissing them off, there Anger know no bounds.

Don't loose an Nmasinachi when u meet one, they are special personalities

Eg. I like this girl a lot, she is so beautiful and is always happy.
She must be Nmasinachi

nmasinachi by Nmasinachi February 5, 2020

nisini 

Nisini is playful, sometimes silly and is always there for her friends. She's sometimes lazy, but when she's active, she could run forever!

Nisini is full of energy today!
"She's doing a Nisini."

nisini by Deathlyhallows3 April 19, 2018

Niesin

The female child of your bruncle/aunster. Your bruncle and/or aunster is your aunt/uncle and sibling at the same time, so their children, in this case the female, is your niesin; your sibling's daughter being your niece, and your aunt/uncle's daughter being your cousin. Therefore the end result is biologically your niesin.

My niesin Sally is such a cutie pie, she's my niece and my cousin at the same time.

Niesin by fartknocker101 December 24, 2009