English Reference
noun · verb

boob

n. · v.
US /ˈbub/ UK /bˈuːb/ boob UK spelling boobing, boobs

  1. 01 B2 Upper Intermediate InformalSlangVulgar

    n.a slang word for a woman's breast.

    n.a slang term for the female breast. Informal and often considered vulgar in professional contexts.

    Simple

    She felt uncomfortable when the men at the bar made a joke about her boobs.

    In context

    The tabloid was criticised for its focus on the actress's physical appearance, specifically for publishing invasive photos of her boobs while she was on holiday.

    Teacher's tip

    While common in casual speech among friends, this term is vulgar and should be avoided in any formal, academic, or professional setting.

  2. 02 B2 Upper Intermediate British EnglishInformal

    n.a silly or embarrassing mistake.

    n.an informal term for a blunder or error. Primarily used in British English.

    Simple

    I made a bit of a boob by sending the email to the wrong person.

    In context

    The presenter made a massive boob during the live broadcast by mispronouncing the prime minister's name.

    Usage

    Often used in the phrase 'to make a boob'.

  3. 03 C1 Advanced American EnglishInformalArchaic

    n.a person who is silly or not very smart.

    n.a person regarded as stupid or foolish. This sense is somewhat dated in modern American English.

    Simple

    Don't be such a boob; everyone knows that's not how the machine works.

    In context

    The protagonist was portrayed as a well-meaning boob who constantly stumbled into success despite his lack of intelligence.

    foolidiotnitwit
  4. 04 C1 Advanced British EnglishInformal

    v.to make a silly error.

    v.to commit a blunder or mistake. Intransitive use, primarily British.

    Simple

    The goalkeeper really boobed when he let that easy ball roll into the net.

    In context

    The administration admitted they had boobed significantly regarding the new tax policy implementation.

    errslip upblunder

Etymology 1

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

Etymology 2

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

Etymology 3

Apparently shortened from booby-hatch.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B1 · Intermediate
Frequency Frequent
Updated