Know it all

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.
Cite This Source Link To know it all
Idioms & Phrases
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature