DictionaryAI

boob

BOOB/ˈbuːb/

Pluralboobs

5 meanings of boob

Practice

  1. 1
    breastnounslangcountable
    A breast, especially a woman's or a teenage girl's.

    The doctor checked the lump in her boob.

    My boobs were sore for weeks after the baby came.

    UsageUse breast in formal or medical talk.

    Similarbreast

    Note
  2. 2
    foolnoundatedCanadaUScountable
    A silly or stupid person.

    Only a boob would leave the car running with the keys inside.

    Not having an ear for music it annoys me to hear the boobs squeal.
    1914, George Vere Hobart, BoobsHere, boobs means fools or silly people.

    Similaridiot, fool, dope, dimwit

    Note
  3. 3
    mistakenouncolloquialBritishcountable
    A mistake, something that you got wrong.

    I made a boob and put salt in the tea instead of sugar.

    Leaving the tickets at home was a silly boob.

    UsageSay I made a boob: a small mistake.

    Similarmistake, blunder, error, gaffe, slip

    Note

Less common meanings

  1. 4
    slip upverbcolloquialintransitive
    To make a silly mistake or act in a foolish way.

    We all boob sometimes, so don't worry about it.

    She boobed on the last question and lost the quiz.

    Similargoof, blunder, slip

    Note
  2. 5
    prisonnounslangAustraliaUSuncountable
    A prison or jail, where people are locked up as punishment.

    His brother is in the boob for stealing cars.

    After six months in boob, she wanted a fresh start.

    UsageSay in boob or in the boob: in prison.

    Similarprison, jail

    Note

Practice

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Origins

Meanings 2–4

A short form of booby, meaning "fool", first used in the early 1900s.

Checked 30 Oct 2026 · 2 facts

Meaning 1

A short form of booby, meaning "breast".

Checked 30 Oct 2026 · 1 fact

Meaning 5

Probably a short form of booby hatch.

Checked 30 Oct 2026 · 1 fact

  • Boob, meaning a prison or jail, probably originated as a shortening of booby hatch. en.wiktionary.org