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"

flat-line by lowkeyimblack June 12, 2018

Social Flat-line 

A term stemming from two seperate lexical choices one of which is 'Social' to be defined as relating to human society and its members and 'Flat-line' which is a medical term to show the absence of heart contractions or the disappearance of the rhythmic peaks displayed on a heart monitor.

In this sense the conjoined term means the 'dead sector of society' So to speak : Nerds, emo's, paedophiles and so on, people who are marginalised and ostracised from society.

Nerd 1: Dude I have a girlfriend now

Nerd 2: No way

Nerd 1: I'm heading off the Social Flat-line

Social Flat-line by yami100 July 21, 2010

flat as a line 

The flattest line you’ll ever meet. Really socially awkward but also not at all it’s really weird. Super nice and will stuck with you for 10 years. What she doesn’t have in butt, she makes up for in personality

“Have you seen flat as a line today?”
“Yeah she’s so flat”
“But her face makes up for it”

flat as a line by Hamitha December 6, 2020

flat liner 

A person who has died, referring to the heart monitor "flat lining", as can be seen in any film featuring an emergency room death.

When Ray makes love to a women, she may say, "it was like sex with a flat liner!"

flat liner by Mark J. July 16, 2008

Flat Liner 

A Gun Used To End Someones Life (The Name Is Self Explanatory)

"Don't Make Me Run Up On Ya With That Flat Liner"
"Yo This Nigga Needs To Die, Ima Hit Him With That Flat Liner"

Flat Liner by HillByNature December 30, 2012

Flat Liner 

An attempted one liner that is not funny at all.

*Kid sees another kid hanging from monkey bars*

"Hey, how's it hanging?"

*crickets*

"That's the definition of a flat liner."

Flat Liner by ADR767 September 9, 2013

Flatliner President 

An increasingly popular nickname for the 45th POTUS as he nears the end of his one and only term.

Thanks in great part to his mismanagement of the pandemic, the Grabber in Chief will from now on be known as the Flatliner President.

Flatliner President by Dr Bunnygirl June 25, 2020