From Longman Dictionary of Contemporary Englishboobboob1 /buːb/ noun [countable] 1 HBH[usually plural] informal a woman’s breast2 MISTAKE British English informal a silly mistake3 STUPID/NOT SENSIBLE American English old-fashioned a stupid or silly person
Examples from the Corpus
boob• Whoops! I think I've made a booboo.• We labelled the pictures with the wrong names, but the boob was spotted by one of our readers.boobboob2 verb [intransitive] British English informal MISTAKEto make a stupid mistake SYN goof American English I think Jean’s boobed again.→ See Verb tableOrigin boob 1. (1900-2000) bubby “breast” ((17-21 centuries)), perhaps from the sound of a sucking baby 2. (1600-1700) Spanish bobo, from Latin balbus “stammering” 