What's the difference between i.e. and e.g.?
"devotee of (modern) folk music," attested by 1966, with -ie.
"characteristic of the common people," 1914, from folk + -y (2). Old English had folcisc "popular, secular, common."
A folk singer or folk-music devotee: The precious youth audience was lost to the folkies and the rockers (1960s+)