slum
Pronunciation: /slʌm/
noun
verb ( slums, slumming, slummed)
- spend time at a lower social level than one’s own through curiosity or for charitable purposes: day trippers slumming among the natives
- (slum it) put up with conditions that are less comfortable or of a lower quality than one is used to: businessmen are having to slum it in aircraft economy class seats

Origin:
early 19th century (originally slang, in the sense 'room'): of unknown origin