225px|thumb|right|Lead singer "Jaz Coleman" dominates the cover of "Killing Joke's" 1986 release ''Brighter Than a Thousand Suns''.
"Killing Joke" are an influential English post-punk rock band formed in 1978. Founding members Jeremy "Jaz" Coleman (vocal, keyboards, synthesizers, and arrangements) and Geordie Walker (guitars) have been the only constant members.
Named after a Monty Python sketch (see:The Funniest Joke in the World), Killing Joke are regarded as one of the most significant bands to have emerged from the post-punk/New Wave era of the late-1970s/early-1980s, having strongly influenced bands such as Nirvana, Metallica, Ministry, Soundgarden and Korn, all of whom have at some point have cited a substantial debt of gratitude to 'The Joke'.
Original drummer "Big Paul" Ferguson once described their music as "the sound of the earth vomiting". Killing Joke's music consists of thick-sounding guitars; rhythms that are heavy, tribal, funky, and danceable (usually all at once); keyboards and synthesizers with sounds typical of New Wave music; and Coleman singing in a talk-sing style, or shouting in a malevolent-sounding growl.