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.

know it all by Mr. Terrence L. Trezvant October 5, 2003

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!"

know it all by Leo Bos August 11, 2008

Know it cold 

To really understand something

I don't have to study shit, I know it cold

Know it cold by Agcdictionary April 25, 2016

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.

know yourself by G Dizzle September 19, 2006

Know your role 

Get back in line; stop acting outside of who you really are

Know your role and give me head, hoe!

Know your role by Agra April 1, 2004

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.

know in the biblical sense by A1988 December 12, 2012

know jack 

Australian slang - means to understand, to know.

he doesn't know jack about rugby - he knows nothing about rugby

know jack by An.kim September 25, 2014