Slum /(slŭm)/

Slum

n.
  1. A foul back street of a city, especially one filled with a poor, dirty, degraded, and often vicious population; any low neighborhood or dark retreat; -- usually in the plural; as, Westminster slums are haunts for theives.
  2. Same as Slimes. (Mining)

Slum

v. i.
  1. To visit or frequent slums, esp. out of curiosity, or for purposes of study, etc. Also called go slumming. [Colloq.]