/ Dictionary / Index B bummer: Meaning and Definition of Find definitions for: bum•mer Pronunciation: (bum'ur), [key] — n. Slang. a person who bums. bum•mer Pronunciation: (bum'ur), [key] — n. Slang. the unpleasant aftermath of taking narcotic drugs, esp. frightening hallucinations or unpleasant physical sensations. any unpleasant or disappointing experience: That concert was a real bummer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bummer (Thesaurus) bummalo bump Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language