The phrase comes from real courtroom procedure, where a lawyer objects when a witness repeats secondhand information instead of describing what they personally saw or heard. Because the wording is instantly recognisable from courtroom dramas, legal commentary, and trial clips shared online, it travelled easily into short-form video as a quick way to shut down a claim. It remains popular because the legal framing makes an ordinary disagreement sound official, final, and funnier than a simple no.