pathological liar

American  

[path-uh-loj-i-kuhl lahy-er] / ˈpæθ əˌlɒdʒ ɪ kəl ˈlaɪ ər /

noun

1. a person who tells lies frequently, with no rational motive for doing so.

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Etymology

Origin of pathological liar

First recorded in 1890–95

Example Sentences

Yes, I’m biased against anyone who’s that uncivil, especially when he disrespects facts or — worse — is a pathological liar.

From Los Angeles Times • Jan. 10, 2025

Hart said that he does not believe it is likely that Santos will become more honest, and that the lawmaker appears to be a pathological liar.

From Seattle Times • Jan. 30, 2023

"He's a pathological liar," Parsa told the Beast.

From Salon • Dec. 1, 2022

A pathological liar and an often absentee dad who has been letting his son, Franklin, down for decades, he nevertheless insists on connection.

From New York Times • Aug. 4, 2022

The only thing you have for measuring what’s real is your mind...so what happens when your mind becomes a pathological liar?

From "Challenger Deep" by Neal Shusterman