Definition & Meaning of "dirtbag"in English

What is the origin of the term "dirtbag" and how is it used?

Dirtbag is a slang term that appeared in mid-20th-century English to describe a person regarded as filthy, morally vile, or contemptible. The term combines "dirt," symbolizing filth or impurity, with "bag," suggesting containment or lumping together, to create a metaphor for someone unpleasant, corrupt, or worthless. Historically, it was derogatory, used to insult someone's character or hygiene. Today it remains informal and insulting, commonly used in casual, critical, or aggressive contexts rather than polite conversation.