Dunning–Kruger effect 

Person who knows very little: Think he knows alot because he has no idea how deep the wormhole goes.
Person who knows a lot: Think he knows nothing because he knows how much he does not know on the subject.

"This anoying guy thinks he knows everything about atomic energy because he watched a documentary on History channel."
"The Dunning–Kruger effect is real in this one dude."

Opposit:

"Im retarded, complex numbers is killing me. Im the worst at math."
"uhm, what the fuck is complex numbers? I think the Dunning–Kruger effect got you big-tym"

Dunning–Kruger effect by SkankHunt99 October 27, 2016

Dunning-Kruger effect 

A condition where a person so dumb, that he fails to realise how dumb he actually is. Frankly, lacking the competence to identify incompetence - often resulting is immense self-confidence and talking massive cock.

bimbo: "I don't eat crabs coz they kill it when it's alive, it's cruel to do that."
dude: "that's the dunning-kruger effect for ya."

Dunning-Kruger effect by Infected_Banana May 13, 2016

Dunning-Kruger effect 

In the field of psychology, the Dunning–Kruger effect is a cognitive bias wherein persons of low ability suffer from illusory superiority, mistakenly assessing their cognitive ability as greater than it is. The cognitive bias of illusory superiority derives from the metacognitive inability of low-ability persons to recognize their own ineptitude. Without the self-awareness of metacognition, low-ability people cannot objectively evaluate their actual competence or incompetence.

As described by David Dunning and Justin Kruger, the cognitive bias of illusory superiority results from an internal illusion in people of low ability and from an external misperception in people of high ability; that is, "the miscalibration of the incompetent stems from an error about the self, whereas the miscalibration of the highly competent stems from an error about others." Hence, the corollary to the Dunning–Kruger effect indicates that persons of high ability tend to underestimate their relative competence, and erroneously presume that tasks that are easy for them to perform also are easy for other people to perform.

He suffers from the Dunning-Kruger effect.

Dunning-Kruger effect by Andreas Kuhn August 16, 2017

Dunning-Kruger effect 

When someone is bad/stupid/ignorant in a field, and thinks they are great/good/guru/expert. This normally happens due to people not having enough knowledge in that field to even know that they are bad at this field. A great place to find and report these people is at /r/iamverysmart

Dude1 : I am an expert in math
Dude2 : You are falling to the dunning-kruger effect (seriously wtf why do I have to include the word in this), all you know is how to add and subtract

Dunning-Kruger effect by Click Here! December 22, 2017

Dunning Kruger Effect 

Just go on Reddit for a minute and you'll see it in action.

Reddit is a scientific experient created to prove the Dunning Kruger Effect

Dunning Kruger Effect by Your father-in-law, Bob February 13, 2023

Dunning-Kruger effect 

In common usage, it means "clueless of being ignorant" but it's used to add an air of fake scientific authority to a cheap shot. It generally outs the author as an incompetent writer, ironically exhibiting the Dunning-Kruger effect themselves.

"G is the classic example of the Dunning-Kruger effect."
G: "No, the classic example is still your Mom's abortionist."

Dunning-Kruger effect by notoriousgit July 22, 2018

Dunning-Kruger Effect 

Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021.

Inject disinfectant under the skin? That’s the Dunning-Kruger effect for ya.

Dunning-Kruger Effect by Frederick Yeo November 15, 2023