verb INFORMAL

1. A contemporary phenomenon; the complete lack of output, input, production or consumption of a human being, usually a young adult and heavily dosed with technology, while conscious and feeling contentedness and comfort.

2. Staring at a screen of no importance for 10 or more minutes while having absolutely no thoughts or other brain activity. Or regrets.

3. Often observed by a confounded teacher not paying attention but also not actively thinking of anything else nor doing anything else either.

4. The doom of human productiveness and self worth.

5. (Google) fail to increase; remain static.

6. (Google) to die
That kid is flatlinging.

Stop flatlining and do something with your life.

It's really a problem, them kids that can flatline all the time and feel purpose in life.

He'd rather flatline than learn something.
by Boris of Catan December 24, 2018
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Flatlining: The act of naked planking.
He took his clothes off and was flatlining on the kitchen table
by BIG RAM February 22, 2012
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When a person doesn't know hot to kiss and either 1) sits there with a limp, half-open mouth and slobers all over your face or 2) puckers up and is otherwise unresponsive.
Kev: Yo man, that girl Cheyanne totally flatlined me, ugh.
Acquaintance: Ew dude, I hate flatlining! What did you do then?
Kev: I dumped her, HA!
by futchkoleepoels September 7, 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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The act of killing someone or using force to hurt somone badly.
by MJC612 April 24, 2009
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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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