The line comes from Dwayne Johnson's run as The Rock in WWE, where his brash, trash-talking promos made him one of wrestling's biggest stars during the late 1990s Attitude Era. 'Know your role' became shorthand for putting an opponent in their place, and the full catchphrase was repeated on television, in video games and by fans chanting along in arenas. As clips moved onto YouTube, TikTok and soundboards, the short shout kept its punch outside wrestling, becoming a quick way to end a debate with attitude.