Lil Jon, born Jonathan H. Smith in Atlanta, became the face of crunk music in the early 2000s as a rapper, producer and DJ famous for shouted ad-libs like 'Yeah!', 'What?!' and 'Okay!'. His gravelly 'Yeah!' shouts anchored the 2004 Usher hit 'Yeah!' featuring Ludacris, which he produced and appears on, cementing the phrase in pop culture. Clipped into a standalone sound, it spread through DJ drops, sports arenas, Vine-era memes and TikTok edits, where its raw hype energy made it a universal stamp of excitement.