Motörhead are a British rock band formed in 1975 by bassist, singer and songwriter Lemmy Kilmister, who has remained the sole constant member. Usually a power trio, Motörhead had particular success in the early 1980s with several successful singles in the UK Top 40 chart. The albums Overkill, Bomber, Ace of Spades, and particularly No Sleep 'til Hammersmith, cemented Motörhead's reputation as one of Britain's foremost rock bands.
While Motörhead are typically classified as heavy metal, speed metal or thrash metal (and often regarded as a foundational influence on the later two styles), Lemmy dislikes such labels, preferring to describe the band's music simply as "rock n' roll". Motörhead's approach has remained the same over the band's career, preferring to play what they enjoy and do best; their appreciation of early rock and roll is reflected in some of their occasional cover songs. Motörhead's lyrics typically cover such topics as war, good versus evil, abuse of power, promiscuous sex, substance abuse, and "life on the road." The band's distinctive fanged-face logo, Snaggletooth, with its oversized boars' horns, chains, and spikes, was created by artist Joe Petagno in 1977 for the cover of the Motörhead album and has appeared in many variations on covers of ensuing albums.