Deadbeat
A "deadbeat" typically refers to a person who avoids responsibilities, particularly financial obligations. This term is often used to describe someone who does not pay debts, such as bills or child support, and relies on others for support without contributing themselves.
In a broader sense, the term can also apply to individuals who do not put in effort in various aspects of life, such as work or relationships. The label carries a negative connotation, suggesting laziness or a lack of accountability in fulfilling one's duties.