sappy

Excessively sentimental; mawkish.

Silly or foolish.

Full of sap.

Abounding with sap; juicy; succulent.

Not firm; weak; foolish; silly; sap-headed.

Softened by putrefaction.

Abounding with sap; full of sap; juicy; succulent.

Hence, young, not firm; weak, feeble.

Weak in intellect.

Abounding in sap; resembling, or consisting largely of, sapwood.