It fits in better with the rest of the theme of the song, which I'm pretty sure is saying how people enforce stereotypes and exert their made up authority over someone else to make them feel more important or special, and that he considers himself one of the few people who work hard and dont' do those sorts of things.
I'm positive it's actually:
"I've never hung a darkie, but i've fed one"
It fits in better with the rest of the theme of the song, which I'm pretty sure is saying how people enforce stereotypes and exert their made up authority over someone else to make them feel more important or special, and that he considers himself one of the few people who work hard and dont' do those sorts of things.