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know-it-all

[noh-it-awl] /ˈnoʊ ɪtˌɔl/
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
1930-1935
1930-35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Slang definitions & phrases for know it all

know-it-all

noun

A person who pretends to virtual omniscience; bigmouth, smart-ass: Just what we need around here, another know-it-all (1895+)


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Idioms and Phrases with know it all

know it all

The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Difficulty index for know-it-all

Few English speakers likely know this word

Word Value for know

11
12
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Quotes with know it all