What's on your mug?

A severe mental disorder where someone struggles with geometry and believes, as you can tell from the name, that the earth is, in fact, flat.

I spanked a Flat Earther for being dumb.

By BoxEarth

a person who does not accept or is out of touch with the realities/ beliefs of modern times; one who blatantly dismisses/ disagrees with common knowledge or scientific findings.

Joe doesn't even believe the planet is round, or that we landed on the moon... he's a flat earther.

By G-Money12321

An imbecile who was dropped on their head as a baby multiple times or divorced people who want to die

Yo that bitch is a flat earther. She tried to talk to me yesterday and I think I lost a brain cell

By Mesa big boy

An utter moron who thinks that the Earth is flat. It is often difficult to sway them into thinking that the Earth is actually round. They often make YouTube videos about their 'proof' that the Earth is flat, which is often debunked by people that know Science. NOTE: Despite what facts you state, they will refuse to believe you and say 'You've been converted.' or 'NASA is lying to you.'

Person 1: "Hey, look at that guy, he's a flat earther!" Person 2: "Yeah, what a bafoon."

By barney is a sexy boi

Someone who thinks earth is a disk; Another definition is a mentally challenged person

The Karen down the street is a flat earther

By Yeeterskertt