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1. noun Someone or something that is unpleasant. This rain is a real bummer—will the sun ever come out again? Stop being such a bummer!
2. noun An unpleasant experience induced by drugs. No, I don't take that stuff anymore—last time was a real bummer.
3. adjective Describing someone or something unpleasant. Oh, it was a bummer party—you didn't miss anything.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
1. and bum trip n. a bad drug experience. (Drugs.) She almost didn’t get back from a bum trip. I had a real bummer on that stuff. I may quit yet.
2. n. a disagreeable thing or person. The game was a bummer you wouldn’t believe.
3. mod. disappointing; unpleasant. I had a real bummer day.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
An unsuccessful, unpleasant, or tedious experience; a failure. At first used to describe a bum trip, a frightening narcotic experience, it was quickly transferred to other kinds of experience. Both rely on the sense of bum meaning “bad,” a usage dating from the late 1800s (see bum steer). For example, “That ball game was a bummer; not only did it rain but we lost.”
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer