Having a “black heart” means being seen as fundamentally cruel, corrupt, or lacking in empathy. The phrase has carried this weight since at least the 1600s, and today it shows up everywhere from casual conversation to emoji use to psychological descriptions of people who seem incapable of caring about others. Depending on context, it can be a serious character judgment, a playful self-description, or something in between.
The Phrase’s Literary Roots
The earliest known written use of “black heart” as a noun dates to 1664, appearing in the work of English diarist John Evelyn. The adjective “black-hearted,” meaning malevolent, shows up in records from the 1630s. Throughout the 1700s and 1800s, the phrase appeared frequently in literature to describe melancholy, hateful people with evil intentions.
The metaphor draws on a long cultural association between the color black and darkness, death, and moral corruption. A black heart isn’t just someone who does bad things occasionally. It implies something deeper: that cruelty or malice is baked into who they are. In speech and writing today, calling someone black-hearted still carries a literary punch, suggesting the person is innately evil or fundamentally corrupt rather than simply flawed.
What It Looks Like in Real Life
When people describe someone as having a black heart in everyday conversation, they usually mean that person consistently shows a lack of empathy. The specific behaviors tend to cluster around a few recognizable patterns.
Someone described this way often dismisses other people’s feelings, sometimes explicitly. They might say things like “you’re only feeling that way because you’re too sensitive” or respond to someone’s pain with jokes or indifference. They may act cheerful right after you’ve shared something painful, not because they’re trying to lighten the mood, but because your distress genuinely doesn’t register for them.
They also tend to have trouble understanding, or caring, how their behavior affects others. This can look like selfishness or vindictiveness without remorse. They may blame people for their own suffering (“if you hadn’t done that, you wouldn’t be in this mess”) and struggle to imagine themselves in anyone else’s position. Relationships with these individuals tend to involve constant friction, because connection requires a level of emotional responsiveness they don’t offer.
The Psychology Behind It
Psychology doesn’t use the term “black heart” as a diagnosis, but the traits it describes overlap heavily with what researchers call the Dark Triad: three personality patterns that share a core of low empathy and self-serving behavior.
The first is Machiavellianism, which describes someone with an exploitative, cynical nature who focuses on being the manipulator rather than the manipulated. The second is narcissism, marked by an exaggerated sense of entitlement, superiority, and grandiose thinking. The third is psychopathy, which combines superficial charm and emotional coldness with erratic, antisocial behavior. Research published in the journal Personality and Individual Differences has found that what binds all three together is a measurable deficit in emotional empathy, the ability to feel what someone else is feeling.
Low empathy also appears in several recognized personality and developmental conditions, including narcissistic personality disorder, antisocial personality disorder, borderline personality disorder, and alexithymia (a difficulty identifying and describing emotions). These aren’t the same thing as being “black-hearted,” but they help explain why some people genuinely struggle to connect with others’ emotional experiences.
The Black Heart Emoji
The 🖤 emoji has taken on a life of its own, and its meaning is more flexible than the traditional phrase. People use it to express sorrow, grief, or mourning. It also signals dark humor, edginess, or a goth aesthetic. In some contexts, it conveys rebellion or emotional complexity rather than actual malice.
If someone uses a black heart emoji in a text or social media post, the meaning depends entirely on tone. A friend posting “love this song 🖤” is expressing a moody appreciation, not declaring themselves evil. Someone captioning a photo of a funeral or memorial with 🖤 is using it as a symbol of grief. The emoji has largely been reclaimed from its darker connotations and now sits comfortably alongside other colored hearts as a style choice.
When People Call Themselves Black-Hearted
Not everyone who uses the phrase means it literally. Some people describe themselves as having a black heart as a form of dark humor or emotional armor, signaling that they’ve been hurt enough to feel hardened or cynical. This is especially common online, where self-deprecating labels function as a kind of identity shorthand.
There’s a meaningful difference between someone who adopts the label playfully and someone whose behavior actually fits it. A person joking about being cold or heartless after a breakup is processing emotion. A person who consistently manipulates, dismisses, or exploits the people around them without guilt is demonstrating the traits the phrase was originally coined to describe. The distinction matters because one is a temporary emotional state and the other is a persistent pattern of relating to the world.
A Literal Black Heart
In medicine, heart tissue can actually darken in color, though this has nothing to do with personality. When a coronary artery becomes blocked by a clot, the section of heart muscle it supplies loses its blood flow and begins to die. This is called an infarct, and the affected tissue undergoes a process where it changes in appearance as cells break down. These areas of damage tend to be well-defined regions corresponding to whichever blood vessel was blocked. The term “black heart” also shows up in agriculture, where it describes a condition in potatoes caused by environmental stress rather than any pathogen, resulting in dark, discolored tissue inside the tuber.