a very poor and crowded area, especially of a city

an inner-city slum 市中心的贫民窟

She was brought up in the slums of Lima. 她在利马的贫民区长大。

a very untidy or dirty place

This house would be an absolute slum if I wasn't here to clean it. 如果不是我在这儿打扫，这套公寓会脏乱得完全不像样子。

to spend time in conditions that are much less good than the standard that you are used to

We ran out of money on holiday and had to slum it in cheap hostels. 我们假期里把钱都花光了，所以不得不降低标准住进了廉价旅馆。