What does "sappy" mean?

Sappy: Hence, young, not firm; weak, feeble. When he had passed this weak and sapy age. Hayward.

Additional senses

  1. 2.Weak in intellect. [Low]
  2. 3.(Bot.) Abounding in sap; resembling, or consisting lagerly of, sapwood.
  3. 4.Musty; tainted. [Obs.]

Sources