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boo–boo

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noun \ˈbü-(ˌ)bü\

Simple Definition of boo–boo

  • : a small injury (such as a bruise or scratch)

  • : a foolish or careless mistake

Source: Merriam-Webster's Learner's Dictionary

Full Definition of boo–boo

plural boo–boos

  1. 1 :  a usually trivial injury (as a bruise or scratch) —used especially by or of a child

  2. 2 :  mistake, blunder


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