Dirt is associated with farming, and therefore with fertility and growth. Something underneath the ground symbolizes the unconscious. Because of the social importance of cleanliness, “dirtiness” has acquired many different connotations, from guilt, to unworthiness (“dirty white trash”), to sexuality (“dirty minds”).... Dream Symbols in The Dream Encyclopedia
Actions or feelings which we feel are grubby or immoral.
The unconscious has a natural morality based on its sense of connection with the universal principles of mating, birth, growth and death. Where our social or sexual life does not align with this or our own consciously accepted principles, we may dream of being dirty. ... A Guide to Dreams and Sleep Experiences
Evil or negative impulses are often represented in dreams as things or people being dirty. In the search for spirituality we may often feel dirty or contaminated by such negativity.... Dream Meanings of Versatile
Material aspects: We will dream of being dirty when we are not operating within our own principles or when someone else’s action has put us in a situation which we find compromises us.... Dream Meanings of Versatile