Lil Jon, the Atlanta rapper and producer who fronted Lil Jon and the East Side Boyz, built his early 2000s crunk sound around shouted ad-libs like Yeah, Okay and What. The What shout became a signature hypeman interjection across his features and productions. As short reaction clips spread on Vine, YouTube and later TikTok, his exaggerated delivery made it a go-to meme for disbelief. It endures because the voice is instantly recognizable and the single word works in any language.