If you dream of hippopotamus, its interpretation might be related to water. For the hippo has a thin skin and it requires water to keep its skin moist. It could suffer stress and die of dehydration in heat and dry conditions.
The hippo stays in water during the day and walks out to land during late evening and night. It looks for food in grass and edible vegetation during the late evening and night.
If you have a habit of snacking after sunset, your habit slightly resembles that of a hippo’s. If you are aware of this peculiar habit that you share in similarity with the hippo, it may trigger a dream about the hippo.