SAPPY Meaning of SAPPY in English ■ adjective ( sappier , sappiest ) 1》 informal, chiefly N. Amer. over-sentimental. 2》 (of a plant) containing a lot of sap.Derivativessappily adverbsappiness noun Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004