Knowitall 

Someone who knows it all and is brown with a white Subaru

Levi the knowitall said he watched two dogs sucks each other off and they both came at the same time because he fingered their buttholes

Knowitall by Miketbag March 23, 2023

knowitall knownothing 

A person who acts like they know it all but prove they know nothing.

I paid attention to what they were saying, until i realized he was a knowitall knownothing. Then i told him to shut up.

knowitall knownothing by GrabControl May 9, 2015

Urban Knowitall 

Guy who puts definitions on urban dictionary to either make someone laugh, or to prove himself right.

Urban Knowitall: guys look on urban dictionary, it has my username! and it says im handsome and rich!
Person: you posted that...

Urban Knowitall by Briksawse232134 May 25, 2020

Knowallogist 

A person who specializes in knowing EVERYTHING about EVERYTHING, regardless of whether they know anything at all.

I asked him if he preferred red or white wine and got a 30 minute dissertation on wine and viticulture! Yeah, he's a Knowallogist.

Knowallogist by Loanwolf February 6, 2014

knowitallism 

To pretend to know all about something.

That stubborn little cunt has a serious case of knowitallism, I'd sure like to kick him in the head.

knowitallism by MjX June 2, 2003

Knowalledge 

know-all-edge: noun: The fact or condition of knowing everything. Knowalledge is commonly found in individuals who know everything about anything. Other common traits for individuals possessing knowalledge are the ability to annoy others, frequent need to correct what people say, and homosexuality.

Mr. Know-it-all has lots of knowalledge

Knowalledge by Big Daddy Samoa March 5, 2010

Knowitallogy 

The practice of believing you know everything when, in truth, you know nothing at all

In-laws, particularly mothers in-laws are masters in knowitallogy

Knowitallogy by The Mighty Big Boy October 5, 2019