"Partytime" is a song by 45 Grave, released as the B-side to the "School's Out" single in 1984. The song was taken from their debut album, Sleep in Safety. However, the single version, dubbed "Partytime (The Story of Sabine)", is shorter in length and notably heavier, with more smoothly flowing lyrics and a shorter introduction. This single version was included on the 1993 reissue of Sleep in Safety. The song is about a five-year-old girl who is brutally raped, abused and killed by her mother and friends, and the events that followed. As Dinah Cancer explained: "It's based on a story that I read in a true crime mag. The insanity and cruelty went on. So that "Partytime" is about child abuse but it is written as a tribute to the little girl, Sabine. The song is about what her family did to her and how she didn't deserve it."
"Partytime" is probably 45 Grave's most well-known song, having been included in the film The Return of the Living Dead and featured on the soundtrack. This "Zombie Version" was shorter and heavier than both previous versions of the song, and eschewed the story of the previous versions. Another version, featured on compilations Autopsy, Debasement Tapes and ''A Devil's Possessions'', has a different vocal melody and is introduced with laughter and different lyrics.
The A-side, "School's Out," a cover of the Alice Cooper song of the same name, was featured as a bonus track on the rereleased version of Sleep in Safety. This version differs little from Cooper's original, but makes use of keyboards.
"Partytime" was used during the Call of Duty: Black Ops "Call of the Dead" trailer.