Superfuzz Bigmuff (1988) is the debut EP by Seattle grunge band Mudhoney, released on October 1, 1988, through Sub Pop. The title references two guitar effects pedals—Univox Super-Fuzz and Electro-Harmonix Big Muff—integral to the band's signature distorted sound. Tracks like “Touch Me I’m Sick” and “In 'N' Out of Grace” exemplify their raw, garage-punk energy, blending elements of The Stooges and early thrash metal. Initially a modest release, the EP has since become a seminal work in the grunge genre, influencing countless artists and earning inclusion in 1001 Albums You Must Hear Before You Die.