slum

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A heavily populated urban area characterized by substandard housing and squalor. Often used in the plural.
2. v. To visit impoverished areas or squalid locales, especially out of curiosity or for amusement.
3. idiom. slum it To endure conditions or accommodations that are worse than what one is accustomed to.

Century Dictionary and Cyclopedia

1. n. In metallurgy, same as slime, 3: chiefly in the plural.
2. n. A dirty back street of a city, especially such a street inhabited by a squalid and criminal population; a low and dangerous neighborhood: chiefly in the plural: as, the slums of Whitechapel and Westminster in London.
3. To keep to back streets.
4. To visit the slums of a city, often from mere curiosity or as a diversion.

Wiktionary

1. n. A dilapidated neighborhood where many people live in a state of poverty.
2. v. To visit a neighborhood of a status below one's own.
3. v. To associate with people or engage in activities with a status below one's own.

GNU Webster's 1913

1. n. 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.
2. n. (Mining) Same as Slimes.
3. v. colloq. To visit or frequent slums, esp. out of curiosity, or for purposes of study, etc. Also called go slumming.

WordNet 3.0

1. v. spend time at a lower socio-economic level than one's own, motivated by curiosity or desire for adventure; usage considered condescending and insensitive
2. n. a district of a city marked by poverty and inferior living conditions