Jeff Plewman (March 26, 1948 – May 10, 2014), better known by his stage name Nash the Slash, was a Canadian musician. A multi-instrumentalist, he was known primarily for playing electric violin and mandolin, as well as harmonica, keyboards, glockenspiel, and other instruments (sometimes described as "devices" on album notes).

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; resuming his solo career in 1978 (it was not until after Nash's departure that the album was widely promoted; eventually charting and receiving a gold record award). He rejoined FM from 1983 to 1996, concurrent with his solo work.