A stoner is the kind of guy (me) who everyone knows is constantly wrecked but is so laid back and friendly that even the anti-drugs people can't help but love him. They are generally highly talented musicians and playstation wizards. Stoners don't force cannabis on people but are normally happy to have a smoke with anyone.
"I hate drugs, but that Mark, I know he's a stoner but he's such a nice lad."
"What? You're a stoner too? Lets go and skin up."