No mention of the late 1820s-to-1830s song "Zip Coon" 

"Zip Coon" was a popular song featured at minstrel shows starting the late 1820s that white blackface performers used to caricature free black men who were trying to fit in with upper class white society.

http://www.npr.org/sections/codeswitch/2014/05/11/310708342/recall-that-ice-cream-truck-song-we-have-unpleasant-news-for-you

71.93.120.216  RandomRacialSlurResearcher