Definitions for "busker"
a person who entertains people for money in public places (as by singing or dancing).
a person who plays an instrument, sings, dances, juggles, mimes, performs an act or entertains the public with either a performance or with visual art for voluntary donations from their audience
a street musician -- a fellow who tends to get around a lot
a street perfomer
a street performer and the Pike Place Market has a long tradition of being friendly to street performers