The phrase comes from Skrilla's 2024 song Doot Doot (6 7), where the numbers are repeated as a hook, and it was linked online to basketball player LaMelo Ball, who is listed at six feet seven inches. Clips spread on TikTok in early 2025, then moved into school slang, sports edits and comment sections where kids repeat six seven for no clear reason. Its humour comes from that randomness and instant recognition, which is why the chant keeps appearing long after the original song clip faded from feeds.