Flat as a rock

This mean "on the downlow"

Yaro: Hey are you gay?
Lucas: Yeah but it is "flat as a rock"

by Scurvy McCheese May 27, 2011

Flat egg

A person whose personality resembles a hard boiled egg that has been peeled and then smushed.

"Ugh that girl has no personality!"
"Yeah, she's a real flat egg."

by CToso69 May 12, 2016

Flat Earther

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 January 5, 2021

flat earther

A separate line of the genus homo sapiens (Humans) who believe that earth is flat. They lack in comprehension and learning skills seeing they believe earth is flat which is of course WRONG.

Random people in the internet: Earth is actually flat, get your facts right.
Me: Hahahahaha, flat earther are stupid

by deathlol November 14, 2017

Flat Tax

a tax by which the tax rate stays the same regardless of the size of the taxable base

An income tax that is a flat tax taxes all individuals at the same rate regardless of income level

by Lil Moff Tarkin August 23, 2010

Flat Tire

When you're walking and someone steps on your shoe and it falls off.

Damnit! Chris just gave me a flat tire and now I have to put my shoe back on.

by Sami45 December 25, 2020

flat as a board

adjective describing a woman with no breasts, that is, flat-chested

"She was a carpenter's dream; flat as a board, and easy to nail."

by Jake March 6, 2004