flat-line

When you take a fat L, and your body momentarily dies because of the pain.

"stay with us bro, don't flat-line"

by lowkeyimblack June 12, 2018

Flat Slut

A flat slut is somebody named Amy who has been in a terrible sexual accident and had their face smashed against a woman's extremely flat breasts. This caused her face to become as flat as a piece of paper. If you ever meet a Flat Slut, don't get too close because she will reel you in and turn you into a condescending dick who gets really annoyed when their threesome with Amy doesn't go to plan because Geraldine doesn't know how to use a vaginal condom.

Guy 1: "Ugh, I met this flat slut at college today."
Guy 2: "Ew, was she flat?"
Guy 1: "Oh yeah, flat as a rat"

by PshycoComedian November 22, 2017

Flat squared

When a girl has a "flat" chest and butt.

Also written as flat^2

"Bro is that a dude?"
"Nah she's just flat squared"

by Clean up Kenny June 4, 2016

Flat Flex

When someone attempts to flex but it falls flat; not a single person is impressed.

Jeff was caught bragging about that one girl he kissed 4 years ago...OMG what a Flat Flex!

by ShortStackB January 25, 2020

Flat Earther

Someone who doesn't believe something if they see it right in front of them.

We sent a flat Earther into orbit, and he said he thinks the windows distorted the Earth to make it look round, so he wouldn't be able to trust his own vision.

by Dozenal>Decimal July 21, 2022

flat hed

A flat hed is someone which a huge fucking head and actually thinks that the earth is flat LMFAO

“OMG did you hear what that fucking big headed flat heds said”
“No what”
“He think the earth is flat”
“Phahahahahah”

“Fuck off”
“Flat hed”

by Stayout February 26, 2019

Flat skin

When you have no penis just flat skin and two raisin bollocks.

Joshua Booth has flat skin.

by Jon Belvoir April 18, 2018