James Jeffrey "Jeff" Plewman, better known by his stage name Nash the Slash, was a Canadian musician. A multi-instrumentalist, he was known primarily for playing the electric violin and mandolin, as well as the harmonica, keyboards, glockenspiel, and other instruments.
Nash worked as a solo artist beginning in 1975; founding the progressive rock band FM in 1976. Soon after releasing the band's first album, Black Noise, in 1977, he left the band; he resumed his solo career in 1978. He rejoined FM from 1983 to 1988, followed by a brief reunion from 1994 to 1996, all concurrent with his solo work.
Nash's music covers an eclectic range, varying from instrumental-mood-setting music, to rock and pop music with vocals. In addition to giving concert performances, he composed and performed soundtrack music for silent films, presenting these works live in movie theatres to accompany screenings of the films. Another venue for his music was in performances to accompany the viewing of paintings by surrealist painter Robert Vanderhorst, an audiovisual collaboration, which took place in 1978 and again in 2004.
Nash famously never allowed guitars on any of his solo albums and singles.