The phrase FBI, open up became a running joke online as a shorthand for an over-the-top raid, often paired with a door crash and a booming voice in short videos and streams. It spread through reaction clips, prank edits and gaming moments, where the sudden shout works as an instant punchline without needing any setup. Because the joke is immediately recognisable, creators still use it to interrupt a scene, mock a suspicious character or turn a small secret into a dramatic bust.