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Synonyms

boob

1 American  
[boob] / bub /

noun

  1. a stupid person; fool; dunce.

  2. British. a blunder; mistake.

verb (used without object)

  1. British. to blunder.

boob 2 American  
[boob] / bub /

noun

Slang.

  1. a female breast.

boob 1 British  
/ buːb /

noun

  1. an ignorant or foolish person; booby

  2. an embarrassing mistake; blunder

  3. a female breast

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (intr) to make a blunder

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
boob 2 British  
/ buːb /

noun

  1. a prison

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. of poor quality, similar to that provided in prison

    boob coffee
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of boob1

1905–10, back formation from booby 1

Origin of boob2

First recorded in 1945–50; apparently back formation from booby 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

These babies even share the mighty boob: breaking a "rule" of mammal biology, naked mole rats do not have just around half as many babies as they have mammary glands.

From Salon • May 11, 2025

"She knows that Mummy had a pain in her boob, she was with me when I went to the emergency doctor," she said.

From BBC • Sep. 9, 2024

I’m proud that I have no vanity in my hair or Botox or plastic surgery or a boob job at this point.

From Los Angeles Times • Apr. 25, 2024

“We worked so much at night, and she would sit around and watch the boob tube,” Warner admitted.

From Washington Post • Dec. 6, 2022

“Good question. I’m the idiot box. I’m the TV. I’m the all-seeing eye and the world of the cathode ray. I’m the boob tube. I’m the little shrine the family gathers to adore.”

From "American Gods" by Neil Gaiman

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.