HIPPO Meaning of HIPPO in English hip ‧ po /ˈhɪpəʊ $ -poʊ/ BrE AmE noun ( plural hippos ) [countable] [ Date: 1800-1900 ; Origin: hippopotamus ] informal a hippopotamus Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012