A black heart (in most cases) indicates negative connotations, such as death, depression, emotionlessness, stress, anxiety, evil (etc.). It can also mean cold heartedness, a term meaning that a person is vile and evil, or without happiness and/or love.
She was given the Black Heart tag on my list because of how she had betrayed me.
by Julius F. Tenpenny August 5, 2018
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a person who is no longer able to feel emotion i.e. their heart is dead. Usually occurs after multiple tragedies is their life.
He is a good guy but after that last deployment he's become a black heart.
by Smalls1993 December 6, 2015
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A person who's morally bad, and isn't good. It's corrupted, and will never be " clean" again.
More.. and more people have a black heart due to personal issues, and experience from life.
by Minialba03 February 11, 2016
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The son of the Devil, and one of the main enemies of Ghost Rider.
When Black Heart tried to bring Hell on Earth, it was up to Johnny Blaze to stop him.
by Danny Duignan on Facebook February 18, 2008
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1. A woman who is as wicked and evil as the worst of your nightmares. One with whom you do not want to upset or anger.
2. A woman who kicks people out of cars when she is angry. Not cool.
3. A woman who gets uglier as time goes on.
4. Typically drives a GREEN jeep.
5. Enjoys giving gifts that are easily broken so she has an excuse to rage on you.
I used to date a girl by the name of Black Heart. Worst time of my life. Ever.
by White Heart November 18, 2009
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1. A woman who is as wicked and evil as the worst of your nightmares. One with whom you do not want to upset or anger.
2. A woman who kicks people out of cars when she is angry. Not cool.
3. A woman who is ugly. Both physically and personality.
4. Typically drives a Silver Honda CRV.
5. Enjoys borrowing things and returning them at the worst times possible.
I used to date a girl by the name of Black Heart. Worst time of my life. Ever.
by Secret! =) July 14, 2008
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A water balloon with a rock inside it. Typically used by drunks, frat boys, date rapists and drunken frat boy date rapists. Or the mentally retarded. People who throw black hearts are typically murdered by their targets.
Man: "Those shit-headed frat boys threw a black heart at my windshield and so that is why I cut their testicles off and stabbed them to death."

Officer: "Oh! A black heart? That's understandable then. You're free to go."
by doublerdiner July 29, 2010
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