Sappy \Sap"py\, a. [Compar. {Sappier}; superl. {Sappiest}.] [From 1st {Sap}.] [1913 Webster] 1. Abounding with sap; full of sap; juicy; succulent. [1913 Webster] 2. Hence, young, not firm; weak, feeble. [1913 Webster] When he had passed this weak and sappy age. --Hayward. [1913 Webster] 3. Weak in intellect. [Low] [1913 Webster] 4. (Bot.) Abounding in sap; resembling, or consisting largely of, sapwood. [1913 Webster]