Osananajimi 

A commonly-used term in romantic anime, an osananajimi is a friend from infancy, a childhood friend or old playmate with whom one shares the special and intimate understanding that (according to such stories) can only come from having known each other since earliest childhood.

A good example of Osananajimi is Manami Tamura from Ore no imouto

Osananajimi by Edgar4815 November 9, 2010

Najimi Osana 

Someone whose gender is a mystery. You may look at that person(checking her out) only to feel disgusted by yourself after questioning what gender that person actually is.

Daaammmnn, that Najimi Osana looks pretty nice(hot)......OH WAIT!!!!! OH GOD NO..WHAT GENDER IS SHE AGAIN?!?! WHYYYYY!!!!!!

Najimi Osana by mossmich September 1, 2019

Osana

The Baka Lord. She is the most annoying rival.

Osana is a baka (idiot)

Osana by No One Cares 2742 July 25, 2017

Osanja

An Osanja is a gentle but fierce girl who will defend you with her life if it came down to it if you ever have the chance of meeting a rare Osanja never lose her

Hey did you see Osanja she is so amazing I want to talk to her but she is attached to that y/n

Osanja by Kuang^^ October 4, 2019

osanna 

A girl who has bright galaxy colored eyes and blondish hair. Very sweet and kind and plays sports. You would fall in love with her so fast because of her amazing personality. Get her before someone claims her as their own.

Hey OSanna
Hey babe/.

osanna by V_Kay August 21, 2016

osayame 

I girl who is extremely active, kinda bitchy, takes a while to get to know, but when you get to know her she is extremely funny and easy going. She is a great friend overall,but if you try to mess with her she might break your arm

carissa omg is that osayame
Alex yeah it looks like she is in a fight
carissa well rip to whoever got in a fight with her

osayame by Phoenix 2.9 December 16, 2017

Osana

A bossy, yet warm-hearted girl, Usually a ginger, but oh well.
She'll boss you around and be hostile to you every now and then, But she'll open up eventually.

Person1: "Ugh, why is that girl so rude?"
Person2: "She's an Osana, that's it."

Osana by Shu-Urban November 6, 2021