A stoner is someone who frequently smokes marijuana. This isn't necessarily a bad thing; many people interpret the name to be derogatory when it is merely a name used to label a certain demographic. Contrary to popular belief, stoners aren't stupid - they vary in intelligence and should not be judged.
Paul is an intelligent and popular kid. He takes many rigorous courses in school and maintains good grades. Of his many interests, weed is one of his favorites . He smokes every day, but is not obvious about it. Yes. Paul is a stoner however, nobody judges him.