A "sleazy" person is someone who is dishonest and untrustworthy.
Here are some examples of people who you might call sleazy:
- a married man who flirts with other women
- a politician who accepts money from big businesses
- a salesman who sells people low-quality products
You can also use "sleazy" to describe places:
We ended up staying in a sleazy motel in a rough-looking part of town.
In this case, "sleazy" means "disgusting".