Lie detector humour has been a familiar comedy device for decades, built around the tension of a test that supposedly separates truth from invention. Online, that idea was compressed into very short clips that creators can drop into edits, reaction videos and social posts whenever a statement needs to be challenged. The format spread because it needs no explanation: most viewers already understand the reference, and the buzzer-style verdict works across languages, games, pranks and everyday storytelling. Its brevity keeps it reusable, which is why it still appears in new memes long after individual lie detector trends fade.