English version


From Longman Dictionary of Contemporary Englishknow-it-allˈknow-it-all noun [countable] especially American English informal  INTELLIGENTsomeone who behaves as if they know everything – used to show disapproval syn know-all British English
Examples from the Corpus
know-it-allOK, if you're such a know-it-all, you try and do it, then.a twelve-year-old know-it-all
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