Dream about someone showing off signifies a loss of innocence or a fall from grace. You are experiencing upward mobility or progressing toward your goals. You may be relying too much on how you think, rather than how you feel or vice versa. Your dream is an admonition for minor obstacles that you must overcome. You putting up a defensive wall in an effort to hide your anxieties or shortcomings.
Someone showing off dream is a symbol for hidden and embarrassing fears over some secret matters that you have not shared with anyone. There is a secret that you are trying to uncover. You may be too self-reliant and that you can do it all. This dream is a signal for issues with authority and seeking approval. Your hidden desires can no longer be contained and must be acknowledged or expressed.
If you dreamt about someone showing off:
You cannot quite pretend that your intentions, as far as someone is concerned, are entirely innocent. You may have to seriously address this situation and consider taking action if you want things to move forward.