A dirtbag is a slang term used to describe someone who is unkempt, lazy, or generally unpleasant. It can also refer to someone who is dishonest or untrustworthy. The term is often used in a derogatory manner to insult someone's character or behavior. Being called a dirtbag is not a compliment and is usually meant to convey disapproval or disdain towards the person being described. Overall, being labeled as a dirtbag is not a desirable trait and is typically associated with negative connotations.