The line comes from Star Trek: The Next Generation, where Captain Jean-Luc Picard, played by Patrick Stewart, repeatedly grows exasperated with the teenage prodigy Wesley Crusher, played by Wil Wheaton. Fans clipped Picard's blunt rebuke and shared it on soundboards, forums and later short-form video, where it became shorthand for telling someone to stop talking. It endures because the dynamic is instantly recognisable even to viewers who have never watched the show: an authority figure finally snapping at an overeager youngster.