Al Swearengen is the central antagonist of HBO western Deadwood, which ran from 2004 to 2006, played by Ian McShane as the owner of the Gem Saloon in a lawless mining camp. The character became famous for elaborate profanity delivered like Shakespeare, and short clips of his insults spread widely on forums, YouTube edits and soundboards. This shut the fuck up line is taken from that performance style and survives because few TV characters have ever sounded so authoritative while swearing, making it a lasting shorthand for furious dismissal.