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ENGLISH · A WORD WITH POSSIBILITIES

boob.

An idiot; a fool.

4 characters1 syllables approx.English language

Meaning & usage

noun/ˈbuːb/
  1. An idiot; a fool.

    Canada · US · dated · derogatory · informal
  2. A mistake.

    UK · informal
Where this word comes from

Clipped form of booby (“fool”). Appeared near the beginning of the twentieth century; more information at booby § Etymology 1.

verb/ˈbuːb/
  1. To behave stupidly; to act like a boob.

  2. To make a mistake.

    informal · intransitive
Where this word comes from

Clipped form of booby (“fool”). Appeared near the beginning of the twentieth century; more information at booby § Etymology 1.

noun/ˈbuːb/
  1. A breast, especially that of an adult or adolescent female human.

    colloquial · slang
Where this word comes from

Clipped form of booby (“breast”). Appeared from the 20th century; more information at booby § Etymology 2.

noun/ˈbuːb/
  1. A prison; jail.

    Australia · US
Where this word comes from

Apparently shortened from booby-hatch.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.