slum 
(slŭm)
(slŭm)n. often slums
A heavily populated urban area characterized by substandard housing and squalor: grew up in a slum near downtown; lived in the slums by the river.
intr.v. slummed, slum·ming, slums
Idiom: To visit impoverished areas or squalid locales, especially out of curiosity or for amusement.
slum it
To endure conditions or accommodations that are worse than what one is accustomed to.
[Origin unknown.]
slummer n.
slummy adj.