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

flatline 

1. (n) A period after quitting masturbation/porn addiction when libido is severely decreased, orgasms are hard to reach and erectile dysfunction is observed in men. Often anxiety-inducing and a common reason to fall back into habitual porn consumption (as a "test" to see if the body still responds). Total duration can vary from a couple of days to over a month; however, they typically go away with time.

2. (v) To experience a flatline.

1. Curses! I just got a booty call from Ann, but I'm in the middle of a flatline, what if I can't perform?

2. "Why didn't you come over to my apartment last night?" "I'd have loved to, but I'm trying to abstain from sexual stimulation and now I'm flatlining." "What, and your fingers fell of as well?"

flatline by willmst July 27, 2014

Flatliner 

A heart stopper. Someone that completely makes your heart stops in awe.

Man, that Emma girl, is a total flatliner.

Flatliner by CxmeronL49 April 8, 2017

Flatlined

The act of killing someone or using force to hurt somone badly.

Bitch, Do you want flatlined!

Flatlined by MJC612 April 30, 2009