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".