lily-white adjective populated entirely by white people; discriminating against black people US,1903
— Helen Dahlskog (Editor), ADictionaryofContemporaryandColloquialUsage, p. 38, 1972
The word had its origin with the Lily-white movement in the Republican Party in 1888. — Malachi Andrews and Paul T. Owens, Black Language, p. 101, 1973