Lil Jon, the Atlanta rapper and producer who helped bring crunk music to mainstream attention in the early 2000s, built much of his stage presence around loud, instantly recognisable ad-libs such as Yeah, Okay and What. Those shouts became part of his signature sound on records and in live performances, and later took on a second life online. Short clips of them are now used as reaction sounds in memes, edits and short-form videos, where a single word can carry the whole joke.