Drill music, also known as drill rap or simply drill, is a subgenre of hip-hop music with sonic origins in trap music and lyrical origins in gangsta rap. It began in Chicago, Illinois, United States, in the early 2010s. Drill lyricism is noted for its ominous, confrontational nature, often including references to gang rivalries and various retaliatory incidents, sometimes murder, although the subgenre is thematically broader. Drill artists often address authentic, real-life conflicts, at times incorporating artistic expressions such as bravado, taunting, and mockery.