a drag meaning

• [American slang]
  Sl. a puff or any kind of cigarette. (Typically: have ~; take ~.)
    She had a drag on her cigarette and crushed it out on the sidewalk.

• be a drag:    [American idiom]to ...
• drag:    Verb: drag (dragge ...
• drag by:    To pass slowly

Examples

1. school is a drag for some youngsters.
2. do n't invite him-he 's a drag.
3. this little party was turning into a drag.
4. his brother is a drag to him.
5. she loves her family, but they are a drag on her career.