A while back, a fella named Ernie Marrs (b. 1932 d. 1998) came up with a little song called "Plastic Jesus." He got the credits for it when it was published in Sing Out! magazine in 1964 (Sing Out! 14/2), but the initial parody was apparently put together by Ed Rush and George Cromarty.
It got wider recognition when it was used in the film "Cool Hand Luke," and has been growing ever since.