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know it all

1. to be extremely knowledgeable or experienced.
2. a person who acts as though he/she knows everything and overwrites (DISMISSES) the ideas, opinions, comments and/or suggestions of others.
by Mr. Terrence L. Trezvant October 5, 2003
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know it all

A person who's quick to interrupt the actions, comments, or approach of others on just about everything they say and do, so as to disapprove in some way and try to correct them with their own views on the topic
"Ann: "I think Jerry needs some tylenol and-"

Pat: "No, No, Ann! When someone feels that way, you need to get them some chicken noodle soup."

Elaine: "Well, I'm going to feed the bird so-"

Pat: "NO, NO, ELAINE! For a bird like this, you only feed it three to four times a day and you want to give it honey."

Ray : "I'm going to run out and get some tools to-"

Pat : "Ray, that's rubbish. To fix a bicycle, you have to use old dirty tools. New tools don't get the job done these day. It's the old fashioned kind that will get the job done."

Janice : "Pat, quit it. You're being an motherfucking know it all. Quit it. QUIT IT!"
by Leo Bos August 11, 2008
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Related Words

Know it cold

I don't have to study shit, I know it cold
by Agcdictionary April 25, 2016
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know yourself

used by aisleyne from big brother, this word means that the person you say it to doesn't know who they are
Aisleyne: you better know yourself little girl.
by G Dizzle September 19, 2006
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Know your role

Get back in line; stop acting outside of who you really are
Know your role and give me head, hoe!
by Agra April 1, 2004
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know in the biblical sense

To know someone in the biblical sense means that you have had sexual intercourse with him or her. It is a reference to the meaning of "know" in the Bible.
Man 1: What do you mean by "know in the biblical sense"?
Man 2: I've slept with her. We dated last year.
by A1988 December 12, 2012
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know jack

he doesn't know jack about rugby - he knows nothing about rugby
by An.kim September 25, 2014
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