Dream about black skirt is a clue for the forgotten past. You need to make sure to think things through clearly. You are not doing anything or going anywhere in your life. This is a message for the decisions and choices that you need to make in your life. You may be expressing your newfound freedom/independence and experiencing a lack of boundaries.
Black skirt dream is a symbol for unfulfilled desires. You need to be prepared for any dissent and backlash. You need to be more objective in your decisions. This dream unfortunately draws attention to past mistakes and regrets in your life. You feel you can not stand up for yourself.
If you dreamt about black skirt:
It may be that what you have to talk about also involves a step into the unknown, and you are somewhat fearful of the consequences. But if you can take that first step, you will see the difference.