Flat Earther 

Someone who doesn’t even have two brain cells. They lack a brain to store said cells in the first place.

Flat Earther: The earth is flat!!!!!!
Sane person: Shut up.

Flat Earther by Pialinist May 2, 2023

Flat Earther 

Someone whose mother drank while pregnant, though it is also a possibility that they have suffered a blow to the head, causing mental retardation.

Person 1: Did you know that Jessica is a flat earther?
Person 2: Yeah, her mom should have never had that one sip...

Flat Earther by ranocchio May 5, 2023

Flat Earther 

A reminder that as much of a failure that you are, there is always someone more disappointing than you.
(although you are currently on Urban Dictionary, so maybe not so much).

"You strike me as someone who would be a Flat Earther"

Flat Earther by younerd July 24, 2023

Flat Earther 

A piece of junk that lacks common knowledge and is an overall fucking dumbass

Oh your a Flat Earther? you should be saying your a dumbass.

Flat Earther by wower321322 November 16, 2023

Flat Earther 

Someone who believes that the Earth is flat.

There goes a Flat Earther.

Flat Earther by Non-Biased-Commenter November 21, 2023

Flat Earther 

Someone named Claudius

A child-like thinker named Claudius has below average IQ, and is a Flat Earther.

Flat Earther by RoundEarther February 12, 2024

Flat earther 

Someone who knows the truth.

Globehead: flat earthers are dumb
Flat earther: calls police

Flat earther by Nonweeb November 11, 2024