The "Maury Lie Detector" meme originates from the popular American talk show "Maury," hosted by Maury Povich. The show is famous for its dramatic segments, particularly paternity tests and lie detector results. This meme typically features Maury Povich holding up a card, often delivering the catchphrase, "The lie detector determined that was a lie!" It is used humorously to expose perceived falsehoods, call out hypocrisy, or highlight an undeniable truth that contradicts a previous statement or belief. The meme's widespread use makes it a classic tool for comedic revelation in online discussions.