To dream that you have a mustache when you don’t really have one signifies that you are hiding an aspect of yourself. You are putting on a disguise or showing a different aspect of your personality. If you are a woman and dream that you have a mustache, then it indicates that you are expressing your power through your words and your verbal expression. If you dream that you or someone is wearing a fake mustache, then it indicates that you are trying to draw attention away from a minor issue or problem.
To dream that you shave off your mustache denotes that you are revealing your true self. You no longer have to hide under some disguise or some shield. Alternatively, the dream means that you are trying to reestablish your reputation, by renouncing your previous activities.
Dreaming that everyone has a mustache indicates that you are suspicious or untrusting of others.