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."
When some resigns or retires from a job, they are on "eternity leave". This can also refer to someone who has passed away, especially someone who worked somewhere for a long time, retired/resigned, then passed away later.
Oh I'm sorry, you didn't know that Kelly is on eternity leave? She resigned and moved to Hawaii!
With regrets I would like to inform you that my boss is officially on eternity leave. I will never see or hear them again. Ever.