But with as many as one in 100 people thought to exhibit signs of psychotic behaviour chances are we have all met someone who falls under the term.
There are a number of warning signs to look out for that may indicate you know a psychopath.
And while popular culture may make us think of serial killers the majority live fairly normal lives day to day.
Researchers agree that psychopathy involves persistent antisocial behaviour, meanness and impaired empathy and remorse, The Mail Online reports.
But they can also have a good attention to detail and engaging in conversation.
Are you dating a psychopath?
Some of the traits you should look out for in a potential partner:
- Pathological lying
- Lowering your self esteem to gain control
- Gaslighting
- Tantrums
- 'Puppy' eyes to gain your sympathy
- Public shaming
- High self worth
Calli Tzani Pepelasi, Lecturer in Investigative Psychology, told The Mail Online: "Romantic partners of psychopaths will therefore soon realise it is hard work to keep up with their partners' continuous need for stimulation and unrealistic long-term goals.
"Psychopaths also tend to show traits of sociopathy and narcissism, and both traits have been been correlated with infidelity.
"That said, psychopaths do appreciate their relationships in their own way."
The Sun Online has already revealed the signs to look out for in a sociopath.
Or you can take our quiz to find out if you might be a psychopath.
And we reveal the dark personality traits that mean you could be a narcissist, sadist or psychopath.
If you recognise these traits in yourself or a loved one, you can visit your GP or callMind on 0300 123 3393.
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