- a person who bums off others.
- the unpleasant aftermath of taking narcotic drugs, especially frightening hallucinations or unpleasant physical sensations.
- any unpleasant or disappointing experience: That concert was a real bummer.
- (used to express disappointment, frustration, or the like): Looks like we're having a test tomorrow—bummer!
- an unpleasant or disappointing experience
- a vagrant or idler
- an adverse reaction to a drug, characterized by panic or fear
