Dreaming that you are vomiting is the mind’s sign of rejection. Vomiting is a bodily function which ejects what your body does not agree with. Therefore, to dream that you are vomiting can be a sign of finding or seeing something that you deem repulsive. Your mind is telling or hinting at you of something that makes you sick, something so awful that you are pushed to the degree that your own body needs to reject it naturally.