Dreams about dirt or about being dirty usually have to do with thoughts and experiences that you perceive to be negative.
You may dream about being dirty when you have had an unpleasant or traumatic experience. You want to “wash away” the memory, just as you would wash off the dirt in your dream.
If you dream that you are covered in dirt, it can mean that you are feeling guilty about something.
A dream of being dirty can also be a warning that you are exposing yourself to negative influences.
Being dirty in a dream can mean that you are uncomfortable with your body.
If you dream that someone else is dirty, you may feel that they are untrustworthy or that they are behaving in an immoral manner.