English

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Etymology

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From bum (unpleasant, depressing).

Pronunciation

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Verb

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bum out (third-person singular simple present bums out, present participle bumming out, simple past and past participle bummed out)

  1. (slang, transitive) To cause a person to be depressed or disappointed.

Usage notes

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This phrase is mostly used in the passive voice or with the subject it, but unlike the synonymous standalone bum, there exist active-voice constructions such as

  Summer weather really bums me out.