busker (n.) Look up busker at Dictionary.com
"itinerant entertainer," 1857, from busk (v.) "to offer goods for sale only in bars and taprooms," 1851 (in Mayhew), which is perhaps from busk "to cruise as a pirate," which was used in a figurative sense by 1841, in reference to people living shiftless and peripatetic lives; compare the nautical sense of busk (v.). Busker has been mistakenly derived from buskin in the stage sense.