As the number of marijuana users has increased over the past four decades, the stoner's image has become less odd, and less identified with young people.

The label of stoner may also be used as a slur against marijuana users. Such a usage describes a person who is constantly high throughout the day with the attributes of being unproductive and forgetful of important tasks. It should be noted that this description is not true of most marijuana users.

Stoner culture is built around the effects of marijuana usage and a self described stoner usually has a relaxed attitude. However, most stoners do not let their marijuana usage interfere with the rest of their lives and stoners are often indistinguishable from non-users.

This is directly from Wikipedia. :stoned: