flufbrain 

Beth price is a flufbrain

Someone that isn't smart at all

You're such a flufbrain jerry

flufbrain by Witwot July 25, 2020

Flatbrainer 

Someone who believe the earth is flat

Anyguywithoutabrain: the earth is flat! I Can not prove it. But god make the earth flat! that's what the Bible says.
Anyotherguywithabrain: shut up flatbrainer...

Flatbrainer by Xanion November 7, 2019