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Several terms redirect here. For other uses, see Know-it-all (disambiguation).

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. A know-it-all will quickly reject opinions, suggestions, thoughts and commentary from others as incorrect, nonsensical and disruptive.[1]

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

See also[edit]


  1. ^ 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.