The chant comes from Doot Doot (6 7) by Philadelphia rapper Skrilla, released in 2024 and widely shared on TikTok in 2025. The lyric refers to 6'7 height and was linked by fans to basketball player LaMelo Ball, helping edits of him spread the hook further, with many listeners also searching it as the 67 sound. Classrooms, sports pages and meme accounts adopted the phrase as a call and response joke, and its simple repetition keeps it popular long after the first viral wave.