Lil Jon is an American rapper and producer whose loud, distinctive ad-libs became a signature part of his crunk-era sound, with 'What' among the most instantly recognisable. The single-word shout travelled far beyond music, becoming a go-to reaction clip in memes, gaming streams and short-form edits where a quick burst of disbelief is needed. Because it is so short and so clear, it still works years later: listeners recognise the voice immediately, and the joke needs no explanation.