A man's smell, attitude, the 'vibe' he gives off, and how people treat him. Different from plain ole "essence" that has a general use.
"Evin" adds a reference to the similar-sounding band and is the name of a man in Hawaii who wears strong cologne and has thereby become associated with the term.
Avery - "What the hell's that smell? It's like someone assed up the Axe in here."
Noah - "Nah, it's Evin, man. Evin and his goddamn essence."
Avery - "I should've known. Evin-fucking-essence."
James - "Don't look now; we got evinessence inbound."
Rayshi - "Where?!"
James - "Don't look so excited. Not that evinessence."
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.