"Kill Bill" is a song by American singer-songwriter SZA from her second studio album, SOS (2022). The song gets its title from Kill Bill: Volume 1 (2003) and Kill Bill: Volume 2 (2004), a martial arts film duology that focuses on an assassin named the Bride and her quest to exact revenge on her ex-boyfriend by murdering him. Mirroring the films' plot, the song's lyrics discuss SZA's fantasy to kill an ex-boyfriend and his new girlfriend out of jealousy. "Kill Bill" is a pop and R&B song backed by an electric bass and synthesizers, with a composition that consists of a midtempo, groovy rhythm and a detuned melody.

Critics praised "Kill Bill" for its candid exploration of SZA's unfiltered, violent emotions. They found her murder fantasies extreme but relatable to a degree, due to its underlying sentiments of doing whatever it takes for love. The song was a huge success in streaming services—it became SZA's first number one on the US Streaming Songs and Billboard Global 200 charts, and it surpassed 150 million global streams on Spotify within a month. The song reached the top 10 in over 10 territories worldwide, including the United States, with number one peaks in six countries.

Following its success on streaming services, "Kill Bill" impacted US radio on January 10, 2023, as the fifth single from SOS. A music video for the song premiered on the same day; directed by Christian Breslauer, it reimagines several scenes from the Kill Bill films, featuring SZA as a rendition of the Bride and Vivica A. Fox, one of the actresses who starred in the duology, in a supporting role. The video ends as SZA confronts her ex-boyfriend and pulls his heart out, killing him.