The phrase "city slums" refers to poor and run-down areas within a city where many people live in extremely dilapidated and overcrowded conditions. Full definition
Those living in city slums unrecognised by law must not be forgotten as local governments try to adapt to a warmer world (climatechangenews.com)
Pioneer sociologists were uncovering the shame of city slums and the disgrace of child labor in field and factory. (religion-online.org)
Council housing began to replace inner city slums in the 1920s, and the process continued into the 1970s, along with substantial private house building and acquisitions. (en.wikipedia.org)