know it 

to agree or support in the most absolute form.

person 1: those mountains are beautiful!

person 2: know it!

know it by sara v January 20, 2009

know it not 

someone who comes off as knowing everything about everything, but upon review is mostly incorrect.

Chris started in today about common-era anthropology...wow what a know it not!

know it not by sandspit December 31, 2009

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-It-All

Someone who thinks they know everything that is to be known. They argue about things that they have no knowledge about. They either act like they know or they really believe they know what they are talking about on any given subject. They are arrogant and believe they are always right. See arrogant, hard-headed

I know what a know-it-all is because I am one.

Know-It-All by Meen5 September 10, 2011

know it all 

pejorative One who makes it appear as if they're an expert on a subject while there are also signals (subtly or blatantly noticeable) that this person doesn't know very much on the subject or at least as much as they're acting like they do on the subject; pretending to have much knowledge on a subject matter

(Note: there are countless ways to seem knowledgeable on a subject as by behaving correctively and correcting people all the time, giving unwanted advice, expressing opinions as fact, not accepting advice or information from others, etc., but when there are also indicators that one doesn't know what they're talking about, they're considered a know it all or engaging in know it all behavior)

"Even though I'm only fifteen and I've never held a job before I want you to listen to me carefully; on your interview, if you're not sitting cross legged, they won't hire you. If you don't nod, they won't hire you. Employers hate when you don't wear a tie. Companies these days aren't into what's on your application. Employers these days are real into the whole look aspect of it all. Take it from me," said my know it all son before I handed him his schoolbag and replied, "Shut up and go to school, dear!"

I found it shocking that some know it all bum out on the street was telling me how to handle my taxes the right way.

I try very hard not to seem like a know it all when discussing scientific matters; I provide evidence and back up what I'm saying and explain to others of my college experience in the field. That way, people regard me as knowledgeable and not a know it all.

know it all by Rick Warwick October 17, 2008