Millie B, a rapper from Blackpool, England, released M to the B as part of the UK grime and diss-track scene, and the track found a second life on TikTok in 2020. A lip-sync video by Bella Poarch using the hook became one of the platform's most liked clips, sparking countless recreations, transitions and dance edits. Its short, chant-like chorus made it ideal for the app's short format, and creators have continued to reuse it for reveals and confident moments long after the initial trend peaked.