Dreaming of a hippopotamus means hiding your true power and strength. Those who do not know your true nature will be in for a surprise upon discovering what you are capable of. Your enemies are hesitant to cross you, as they have heard stories, but never witnessed your destructive actions. Continue to leverage the unknown to your advantage, and show your strength only when necessary.
Some say seeing a hippopotamus in a dream represents steadfast foundations of relationships where nothing, including the people involved, would be in doubt.