Discharge is a British hardcore punk band formed in 1977 by Terry "Tezz" Roberts and Roy "Rainy" Wainwright. They are often considered among one of the very first bands to play hardcore punk. While the band had substantial lineup changes over its history, the core members over the early 1980s, when the band produced its key recordings, were Kelvin "Cal" Morris (vocals), Tony "Bones" Roberts (guitar), Roy Wainwright (bass), and Terry Roberts (drums).
The band's music is characterized by a heavy, distorted, and grinding guitar-driven sound and rawly shouted vocals, with lyrics on anarchist and pacifist themes. The band's first album in 1982, Hear Nothing See Nothing Say Nothing, went to number two on the UK Indie charts and number 40 in the UK Album Chart. In the early 1980s, the group had a number of singles and EPs place in the top 10 of the UK indie charts, including the 1981 EP Why(#1) and the 1982 single State Violence State Control.
After 1982, the addition of guitarist Peter "Pooch" Purtill brought significant thrash metal crossover elements to the band. In the 1990s, the band released several metal-influenced albums, which alienated some of the original fan base. In the early 2000s, the original line up was reunited and they released a self-titled album using the 1980s musical style. Discharge's music influenced hardcore punk, thrash metal, crust punk, grindcore and various extreme metal subgenres. The most well-known thrash metal bands covering Discharge songs include Metallica, Anthrax, and Sepultura.