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For the album by Alessia Cara, see Know-It-All.
"Know-all" redirects here. For the German fairy tale, see Doctor Know-all. For the book by A.J. Jacobs, see The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World.

A know-it-all or know-all is a person who constantly presents their input as though they were professionally trained, schooled or have firsthand insight into subjects when it is evident this is not the case. Opinions, suggestions, thoughts and commentary from everyone else is quickly shot down as incorrect, nonsensical and disruptive.[1][2]

The German word Besserwisser is also used in some languages, literally meaning "better knower".

See also[edit]


  1. ^ Marion Ledwig (2008). "Inconsistencies in the Christian Tradition II: The Paradoxes of Onmipotence and Omniscience". God's Rational Warriors. ontos verlag. p. 201. ISBN 9783938793879. 
  2. ^ Marilyn Pincus (2004). "The Know-It-All". Managing difficult people: a survival guide for handling any employee (2nd ed.). Adams Media. pp. 75–86. ISBN 9781593371869.