If you need to describe someone who lies frequently, ordinary descriptive terms such as habitual liar, fabricator, or habitual deceiver are usually safer and clearer than labels that imply a psychological diagnosis. The best wording depends on how direct you want to be.
Best Descriptions by Tone
- Habitual liar
- Frequent liar
- Persistent liar
- Serial liar
- Habitual deceiver
- Fabricator
- Deceiver
- Dishonest person
- Untruthful person
- Someone who makes things up
- Someone who bends the truth
- Unreliable source
Habitual liar
Habitual liar is a direct phrase for someone who lies repeatedly as a pattern of behaviour.
Example: He had become known among colleagues as a habitual liar.
Frequent liar
Frequent liar is plain and factual-sounding when you want to describe repeated lying without suggesting why it happens.
Example: The witness was described as a frequent liar by several people who knew him.
Persistent liar
Persistent liar stresses that the dishonesty continues over time or despite being challenged.
Example: A persistent liar can make even accurate statements difficult to trust.
Serial liar
Serial liar is a strong informal phrase for someone who tells lies repeatedly across different situations.
Example: The article portrays the character as a serial liar.
Habitual deceiver
Habitual deceiver is more formal and focuses on a recurring pattern of intentionally misleading others.
Example: The novel’s antagonist is a habitual deceiver who manipulates everyone around him.
Fabricator
Fabricator means someone who invents false details, stories, or claims.
Example: Investigators concluded that the supposed eyewitness was a fabricator.
Deceiver
Deceiver is a broad noun for someone who intentionally causes others to believe something false.
Example: The story follows a skilled deceiver whose identity is gradually exposed.
Dishonest person
Dishonest person is broad and less rhetorically loaded than several harsher labels.
Example: The complaint accused him of being a dishonest person who repeatedly misrepresented events.
Untruthful person
Untruthful person is a relatively restrained description for someone who does not consistently tell the truth.
Example: The report described the source as untruthful rather than merely mistaken.
Someone who makes things up
Someone who makes things up is conversational and works when the problem is invented stories or details.
Example: I stopped relying on him because he often makes things up.
Someone who bends the truth
Someone who bends the truth suggests distortion, selective presentation, or exaggeration rather than outright fabrication every time.
Example: She tends to bend the truth when telling stories about her achievements.
Unreliable source
Unreliable source is useful when the practical issue is whether information from the person can be trusted.
Example: Because his accounts kept changing, he was treated as an unreliable source.
Avoid Diagnosing Motives or Conditions
Terms such as pathological liar and compulsive liar are often used casually, but they can sound like clinical diagnoses. Unless a relevant professional assessment is actually being discussed, describing the observable behaviour is more precise.
In formal writing, it is often better to describe the evidence directly: for example, gave inconsistent accounts, made repeated false claims, or provided information that could not be verified.