A nina is a weapon used to cause ill intent on another person(s). Can also be used in instances of self-defense. Often used in reference to a firearm, a Nina can refer to any weapon.
"Oh shit, Axelgot the nina on him."
"They ran up on Axel but he had the nina on him"
The most beautiful and kind person. She might stay up till 1 am, but she always has enough energy to listen to whatever you have to say and loves you for you. Every boy loves her because of her intelligence and natural beauty. She is one of the good ones and has the most witty sense of humor that will make you laugh for hours. If you get a chance to meet one in person, seize the opportunity.
"Hey I'm your best friend right?"
"WTF no bitch, Nina is"
"Oh...yeah ok that makes sense"
Nina is a woman, who is always EVERYWHERE. Even when you think that you won't see her, she will appear out of nowhere. There isn't a day when you don't see Nina. You can see her at most random times, walking around the city or even waving from the bus.
A: "Have you seen Nina today?"
B: "Of course I have, she is EVERYWHERE!!"