"Poppin" is a song by British YouTuber and rapper KSI featuring American rappers Lil Pump and Smokepurpp from the former's debut studio album, Dissimulation (2020). Produced by Diego Ave, Go Grizzly, Mally Mall, and OG Tint, the song was released for digital download and streaming by RBC Records and BMG on 27 March 2020 as the third single from the album. "Poppin" is a hyperactive hip hop track with elements of trap and mumble rap, with a bouncy and bass-heavy production. The song's lyrics centre around flexing, mostly money and expensive jewellery. KSI admitted that "it's not a super serious song" and the aim was to "just have some fun with it".