A guy that will typically try to roast you and try to act as if he's one of the group, but in all reality he's the outcast that no one wants to talk to.
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
A name of a boy mostly from the south south part of Nigeria, he is full of energy, very open minded and handsome, he has a very large heart.
An extremely loving guy but is usually stubborn.