The sound comes from WTHELLY by American rapper Rob49, released in 2025, where the chorus plays with variations including what the helly, what the hellyante and what the hellyon. Short excerpts spread quickly on TikTok, where users isolated the most sing-song variation and reused it as a reaction to odd moments. Its appeal is the escalating wordplay rather than a literal meaning, so the phrase became a standalone meme detached from the full track. It remains popular in edits because listeners recognise the hook within the first few seconds.