flat-earther

[ flat-ur-ther ]

noun

1. a person who adheres to the idea that the earth is flat.
2. a person who clings to an idea or theory that has long been proved wrong.

flat-earther

noun

1. informal.
   a person who does not accept or is out of touch with the realities of modern life

Word History and Origins

Origin of flat-earther¹

1930–35; flat earth + -er ¹

Example Sentences

He has gone from a seemingly innocuous flat-Earther to a troubling coronavirus vaccine critic to a promoter of antisemitic tropes.

From Washington Post

Some may quibble about lumping together a flat-earther with a climate-change denier, but we gain nothing by listening to either extreme view.

From Seattle Times

As it happened, flat-earthers got a warmer reception at Sunday's rally, where event emcee JP Sears said, "I kind of feel like a flat-earther believing in natural immunity. No offense, flat-earthers."

From Salon

In a rare moment of self-awareness at the anti-vaccine rally, JP Sears, the event’s emcee, quipped that because of his belief in natural immunity to the coronavirus, “I kind of feel like a flat-Earther.”

From Washington Post

“It doesn’t have any censorship, so it has to be this way. These days, if you post a story pointing out a problem with the vaccine, you’re called a flat-earther, a denier, a propagator of fake news. People, Telegram is an alternative.”

From Washington Post