Bad Sister is the debut album by Roxanne Shanté, released in 1989 on Cold Chillin' Records. The album peaked at No. 52 on the Top R&B/Hip-Hop Albums chart.
Bad Sister was produced by Marley Marl. Big Daddy Kane contributed lyrics to a couple of the album's songs. In Rolling Stone, Chuck Eddy said the album's "homemade double-entendre slang gets as nasty as its beat. That beat â which Marley Marl's mix thickens house style with up-to-the-minute boogie piano, Shaft-derived wah-wah, dub echo, frat-party noise and horny horns â just couldn't be nastier."
The New York Times wrote that the songs "combine humor and raw rhythmic power with Ms. Shante's sturdy sense of identity ... [they] proves she's tougher and wittier than the competition." Trouser Press thought that "Shanté has a cute, coy voice that takes on an authoritative edge when she kicks into high gear." The Spin Alternative Record Guide called Bad Sister "a true hip-hop masterpiece" and a "definitive Cold Chillin' album." USA Today praised the "hilarious, sometimes risque stories."
In 2022, Rolling Stone placed Bad Sister at number 175 on their list of the 200 Greatest Hip-Hop Albums of All Time. The magazine's writer Charles Aaron said, "Her old-school playground sass, pitiless flow, and casually eviscerating wit turned songs like "Bad Sister," "Live on Stage," "Have a Nice Day," and "Go on Girl" into giddy celebrations."