"Mic Drop" is a song recorded in two languages by South Korean boy band BTS. The Korean version was originally included as a B-side track on the band's fifth extended play, Love Yourself: Her (2017), and later remixed by American producer and DJ Steve Aoki. The remix was released as the second single from the EP on November 24, 2017, by Big Hit Entertainment and features a guest appearance by American rapper Desiigner. It was serviced to US contemporary hit radio on December 5, 2017, as a single in that country. The Japanese-language version of "Mic Drop" was released on December 6, 2017, by Def Jam Recordings and Virgin Music as a triple A-side single album that included "DNA" and a new, original song "Crystal Snow", both also in Japanese. Both the Korean and Japanese versions of the song were written by Supreme Boi, "Hitman" Bang, J-Hope, RM, and Pdogg, with the latter of the five solely handling production. The remix version was also written by the same songwriters, with additional songwriting by Aoki, Desiigner, Tayla Parx, Flowsik, and Shae Jacobs. It was produced by Aoki, with Pdogg providing additional production. A hip hop song, the lyrics celebrate BTS' numerous achievements.

A boy band is loosely defined as a vocal group consisting of young male singers, usually in their teenage years or in their twenties at the time of formation. Generally, boy bands perform love songs marketed towards girls and young women. Many boy bands dance as well as sing, usually giving highly choreographed performances. South Korean boy bands usually also have designated rappers.