The greeting comes from Budweiser's Whassup advertising campaign, first shown on television in 1999, in which a group of friends greet each other by phone with the same drawn-out word while watching a game and drinking beer. The ads became an instant catchphrase, were parodied on television and in films, and entered everyday speech far beyond the original commercials. Decades later the shout survives as a meme sound because it instantly signals friendship, nostalgia and an exaggerated hello without needing any explanation.