To dream that you are rear-ended could indicate that you are afraid that someone else’s careless or reckless behavior will have a negative impact on you. It could also indicate that some aspect of your past is catching up with you. You may have thought you put it behind you, but it will come to “bite you in the butt,” so to speak if you don’t deal with it. Look for other clues in the dream to determine what it is you felt you were done with, but actually are not.