The process of hanging around poor people to either -
A. Make fun of them.
B. Make yourself feel better about your own life or give pity/gain experience slummin it to see what life is like out there for the unfortunates.
Carl went slumming yesterday at the village. When he arrived he went into their tiny smelly apartment and spit on the floor and ripped up a couple of their rags. Also made fun of the poor kids running around in their underwear.
Bob went over the projects to rough it out and see what it was like to live a day in the life of someone who lives worse than ethiopians.