Someone severely lacking in personality; a person who kills any festive mood with their utter dullness
Dottie was having a good time, until she got stuck with that flatliner.
by D*Tice June 8, 2003
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Being so drunk that you blackout and can't recall a long period (an hour or more) from the previous evening.
I must have been flatlined last night, cause I don't remember stretching my scrotum skin in front of your parents.
by Chris Johnson February 20, 2004
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someone who is boring, unenergentic, tired, sleepy.
Dont be a flatliner! Here's a beer, c'mon lets get drunk!
by DanteM August 4, 2005
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1. To be dead, refering to how ECG machines' little green line goes flat when someone is dead.
2. To kill someone, literally or figuartively.
3. To be retarded, metally challenged, stupid, dimwit, and/or dumb.
4. A game where people choke themselves to get the feeling equivalent to be high. Therefore, legally high. Also known at the Choking Game and Space Monkey(s).
1. "Doc, the patient hass flatlined!"
2. a) The marine flatlined the Iraqi terrorist.
b) "I'll flatline you if you tell my mom I got a 46 on my math test!"
3. "Did you just figure out that water is wet? Wow Flatline, you're a few fries short of a Happy Meal.
4. A lot of kids accidently kill themselves trying to get high while playing Flatline
by Carrera's Wedge April 28, 2007
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A person whos eyebrows lack an arch.
Gentleman: Hon, you should really pluck your eyebrows, you look like a total flatliner.
Woman: Thanks, Hon.
by LadyGagum November 27, 2009
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A monotonous, expressionless person, lacking any enthusiasm or emotion. The term comes from hospital lingo, where a patient is said to flatline when a continuous straight line is displayed on their heart monitor, indicating death.
"...as excited as that flatline can get. I had to remind him twice to keep breathing."
by Der Golem February 7, 2010
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An alcoholic beverage (a "bomb") made by dropping a shot of one part Goldschlager and one part Jagermeister into a vodka redbull. Consumption of multiple flatlines may cause one to become "flatlined."
Gully: Yo I had like twelve flatlines last night. I wasn't that drunk though.
Person number 2: No. You were flatlined, you got kicked out, and shut up.
by J'Mackafart September 20, 2010
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