The act of killing someone or using force to hurt somone badly.
by MJC612 April 24, 2009
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When ones cell phone has no signal at all and the cell phone shows no bars.
On some cell phones it comes up as a flat line instead of bars or an x.
May be used as Flatline, Flatlined, or Flatlining to describe having no cell reception.
Ex. 1

Dude 1: Dude, Where is this party?
Dude 2: Idk, call Sarah.
Dude 1: I can't I'm Flatlining.

Ex. 2

Girl: Why the hell didn't you call me back last night?
Boy: Sorry babe, I had a Flatline.

Ex. 3

Dude 1: Anyone have cell reception?
Dude 2: Naw, I'm Flatining.
Dude 3: I'm Flatlined too.
Dude 4: Got a Flatline.
by Lead Fist June 30, 2010
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When you text someone and they don't respond after they read it
Dude Nikki just flatlined me. It's been like fifteen minutes.
by that last guy May 11, 2015
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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?"
by willmst July 27, 2014
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A heart stopper. Someone that completely makes your heart stops in awe.
Man, that Emma girl, is a total flatliner.
by CxmeronL49 April 8, 2017
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1. dead(from the flat line on the heart monitor of the patient when there is no heart activity, meaning that they have died or their heart has stopped)

2. to die
Don't let him flatline now.
by The Return of Light Joker February 4, 2009
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one of the most fuckin amazing bands ever. mostly punk with their new album "the great awake" but also ska/punk especially in their other full length "destroy to create". from toronto. consists of chris cresswell (vox/guitar), scott brigham (guitar), paul ramirez (drums), and jon darbey (bass). great, original band. some of their best songs include "fred's got slacks", "eulogy", "spill your guts", and "this respirator".
the flatliners play a sick show and fuckin rock!
by fuck names! April 20, 2008
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