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 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

know it all 

A person who thinks they are all that and a bag of potato chips. They correct people all the time in an annoying, rude way.

Mother , father, and daughter are in the room.
"What is wrong." Father asked.
"I'm sick. I don't feel so good." mother answered.
"It' s not ,'I don't feel good', it's I don't feel well "daughter said.
"Don't be such a know it all" said the mother.

know it all by sour grapes i hate kias December 30, 2016

Know it all 

A walking dictionary. Somebody who either has to have 2 or more definitions per word for every one definition you type, or has to have a comeback example of the word, or another way it is used.

True Know it all- Peace is also an interjection Bart, you didn't know that because it wasn't on your list of uses of the word peace, and you were dead serious when you said it.
Bart-You're being kind of hard on me don't you think? I made a list of everything but interjection for peace, and it wasn't good enough for you know it all.

Know it all by Solid Mantis September 3, 2018

Know It All 

A Know it all is an egotist or most likely prideful or egotistical type. Know it all is someone who acts and thinks they know everything constantly. And they like to argue with people a lot. If a person is argumentative and argues with you so much it makes them a stubborn person and stubborn people like that think they are right about everything. A know it all is a hardhead who thinks they are smarter than others.

Jerry is a know it all because he argues with emma because jerry thinks he knows more about science than her.

Know It All by TheAwesomeJUNK June 26, 2019

Know it all 

Person typically has one button and it’s their way or nothing else. Don’t disagree with a know it all because if you do your entire day will change. They will quickly flip the script and could even lead to hate crimes, or even worse the “ K bye”

A know it all would say “I’m right when I’m right and I’m right when I’m wrong”

Know it all by Reneman May 31, 2018