A slumlord is a person who owns a building in a very bad part of a city and doesn't take care of it. The building might be dirty, unsafe, or have many things broken.
A slumlord is a very bad person who doesn't care about the people who live in their building.
Examples:
The slumlord doesn't fix anything in the building.
The slumlord doesn't care about the people who live there.
The slumlord's building is very dirty and unsafe.
The slumlord's building is so bad, even the rats don't want to live there.
The slumlord's building is like a scary movie come to life.
The slumlord is so mean, they don't even fix the broken windows.