A user. A backstabber. Somebody never to be trusted.
"Johnny really gave me a Vadino when he fired me."
"Whatever you do- don't turn your back on that Vadino."
An extremely old vagina; so old, its dinosaur old.
"She didn't look all that old in the club, but when we got back to my pad and she took off her clothes, her vadino looked like it was a hundred years old."