The origin of the phrase "Jim Crow"
The phrase "Jim Crow Law" first appeared in 1904 according to the Dictionary of American English, although there is some evidence of earlier usage. The origin of the phrase "Jim Crow" has often been attributed to "Jump Jim Crow", a song-and-dance caricature of blacks performed by white actor Thomas D. Rice in blackface, which first surfaced in 1832 and was used to satirize Andrew Jackson's populist policies. As a result of Rice's fame, "Jim Crow" had become a pejorative expression meaning "Negro" by 1838 and when the laws of racial segregation – directed against blacks – were enacted at the end of the 19th century they became known as Jim Crow laws. Wikipedia