John Cale means in slang: Only member of Velvet Underground that DESERVES rights. On a serious note, John Cale is a Welsh multi-instrumentalist and seminal member of 1960s avant-gardeproto punk band, the Velvet Underground. He was a key player in the band, playing keyboard and viola. He was fired in 1967 from the group and began his solo career as both a music producer, as well as an artist-soloist. (in Slang Dictionary, added by Alexandra Mcmillan)