The '6-7' chant exploded on TikTok in 2025, with kids yelling 'six-seven' in school hallways, gyms and sports edits. It grew out of the song 'Doot Doot (6 7)' by Chicago rapper Skrilla, whose hook repeats the numbers, and it caught fire alongside basketball culture because 6-foot-7 is a classic hooper height, most famously linked to LaMelo Ball. The meme became a shorthand for anything tall, big or hyped, and stretched-out shouts like this one are how creators keep the joke loud and recognizable in short videos.