know-it-alls

know-it-all

[noh-it-awl]
noun
1.
a person who acts as though he or she knows everything and who dismisses the opinions, comments, or suggestions of others.
adjective
2.
of or characteristic of a know-it-all.

Origin:
1930–35

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Slang Dictionary

know-it-all definition


  1. n.
    someone who gives the impression of knowing everything. : Pete is such a know-it-all!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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