Bacdafucup /ˈbækdəfʌkʌp/ is the debut album from hardcore rap group Onyx. The album featured their breakout single, "Slam", which received heavy airplay on both radio and television (MTV and BET), leading the song to reach #4 on the Billboard Hot 100. Bacdafucup was certified platinum by the RIAA on October 25, 1993.