Sappy

adjective

1. Excessively sweet, emotional, nostalgic; cheesy; mushy. (British equivalent: soppy)

   "It was a sappy love song, but it reminded them of their first dance."

2. Having (a particularly large amount of) sap.
3. Juicy.
4. (of wood) Spongy; Having spaces in which large quantities of sap can flow.