slum (n.) Look up slum at Dictionary.com
1845, from back slum "dirty back alley of a city, street of poor or low people" (1825), originally a slang or cant word meaning "room," especially "back room" (1812), of unknown origin, pastime popularized by East End novels. Related: slums. Slumscape is from 1947.
slum (v.) Look up slum at Dictionary.com
"visit slums of a city," especially for diversion or amusement, often under guise of philanthropy, 1884, from slum (n.). Pastime popularized by East End novels. Earlier it meant to visit slums for disreputable purposes or in search of vice (1860). Related: Slumming.