“Everybody lies” is the recurring House M.D. phrase expressing House’s belief that patients often deceive doctors.
Gregory House uses the phrase to justify skepticism toward patients’ histories and explanations. In the show’s diagnostic logic, a symptom may be misleading, incomplete, or connected to a concealed behavior, so House’s team must test claims against medical evidence.
The line became one of the series’ best-known catchphrases and appears in promotional descriptions of House’s worldview. It does not mean that every patient is deliberately dishonest in every situation. Rather, it reflects House’s deliberately cynical approach to diagnosis and human behavior.
The phrase is often confused with the finale title “Everybody Dies.” They are different expressions: “Everybody Lies” is a recurring idea in the series, while “Everybody Dies” is the title of the final episode.