know nothing know it all 

A person who knows nothing about most topics they chime in on in conversation. This person will be 16 years old with zero experience about farming and tell a farmer about crop rotation. This person will tell a European car technician what's wrong with their car, refuse to pay diagnosis, because they used to work at Chevy in the 80s, and then bitches when the car isn't fixed.

Rather than listening and increasing their knowledge they insist to run their mouth to the point where everybody is annoyed.

Tim actually gave advice to Matt Damon about how to play Jason Bourne better? What a fucking know nothing know it all.

know nothing know it all by Maiorani January 1, 2017

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

Mr. know it all 

Someone who believes they've got the answer to every question even if the question hasn't been asked or if they really don't have the answer (... but of course they believe they do). This is not a shy individual, but rather someone whose ego is over flowing primarily through their mouth, but seems to have come from the other end of their digestive system.

Standing in the door of his single wide, Mr. know it all gave me his latest real estate tips.

Mr. know it all told the CIA there were weapons of mass destruction in Iraq. Unfortunately, they were listening.

Mr. know it all by polarpaul July 5, 2005

Nancy Know-it-all 

A person who behaves as if they know everything, specifically in the context of a social atmosphere in attempts to look cool around others.

Jack: I got some champagne for the party!
Derek: Actually Jack, champagne is from one specific region in California, you just technically brought sparkling wine.
Jack: You're being a little Nancy Know-it-all Derek...

Nancy Know-it-all by MagicManMatt October 30, 2017

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