"Fack" was a song released on Curtain Call explicit and deluxe edition. It is one of the three previously unreleased songs on the album. The song is a play on the word “fuck”. The song revolves around a mans odd sexual encounter with an attractive woman that includes anal fingering and gerbilling. The word “fack” is used repeatedly during the song.
The song was written by Marshall Mathers, Luis Resto, and Steve King.