Word Origin & History
ham (2)
"overacting performer," 1882 Amer.Eng., apparently a shortening of hamfatter (1880) "actor of low grade," said to be from an old minstrel show song, "The Ham-fat Man" (1863). The song itself, a black-face number, has nothing to do with acting, so the connection must be with the quality of acting in minstrel shows, where the song was popular. The notion of "amateurish" led to the sense of "amateur radio operator" (1919). The verb in the performance sense is first recorded 1933.