One who believes they are better than others simply because he/her uses marijuana. They believe that marijuana is the solution to everything, and tend to look down on those who choose not to use marijuana. Marijuana elitists also believe that marijuana is not a drug, but an herb, obviously not knowing the definition of a drug.
Marijuana elitist: "Marijuana isn't a drug, it's an herb. It's the healing of a nation, and it should be legalized."
Guy: "Cool story bro. Go make me some toast."