Lowlife (noun)

1. A person considered to be morally or socially debased.
2. A person who leads a dissolute or degraded life.

Origin:

Early 20th century, from low + life.

Examples:

1. He was a lowlife who preyed on vulnerable women.
2. The nightclub was full of lowlifes and shady characters.
3. She had no time for lowlifes like him.
4. The lowlife was arrested for drug trafficking.
5. He was a lowlife who had no respect for anyone.