Dream about being unprepared for work represents your vulnerabilities and weaknesses. You are having difficulties expressing your negative feelings. Perhaps there was some unfinished issue that is still left lingering for a long time. It is a sign for your sense of stability in your life, either financially, mentally or emotionally. You need to be more vocal about your feelings, particularly what makes your happy and what makes unhappy.
Being unprepared for work dream expresses a situation where you need to be on your best behavior. You are trying to divert attention elsewhere, other than yourself. You are overly emotional. This dream points to some abusive situation or unfortunate circumstance. You are not voicing your opinions or beliefs loud enough.
If you dreamt about being unprepared for work:
It is not that it is a particularly embarrassing subject, but just that it involves taking a risk, which can be problematic enough to negotiate at any time. If you can enter into the dialogue in the right way, it will all be fine.