Most all porches used to have swings. I think it's a reference to people swinging like monkeys on the porch all day while hard workers pay taxes to support them. Plenty are black, plenty are white, plenty are Hispanic( a growing population, I'm afraid). And a good many are Asian, and I suspect there are pretty healthy numbers of Asian porch monkeys in areas like Chambodia in Atlanta.
I get that blacks are sensitive about this stuff, but everybody who uses such terms is not referring exclusively to blacks, but rather to a class of people. My opinion, anyway. And, to be honest, blacks are abusing the safety-net system in high relative percentages. I'm assuming the higher the usage, the higher percentage of abusers; many need and deserve the help.
I heard the black unemployment rate is the lowest in history under Trump. Surely that means blacks will flood the polls for Trump, right?
https://www.statisticbrain.com/welfare-statistics/