The greeting comes from the late 1990s Budweiser Whassup adverts, where friends shouted a slurred wassup at each other on the phone. Scary Movie parodied the ads in 2000 with an even longer, looser wazaaa delivery that many listeners now associate with the sound. Clips and remakes spread through early meme pages, forums and video edits, turning a beer advert catchphrase into a universal goofy hello. It remains in rotation because the stretched vowel is recognisable in a second and needs no setup.