sappy

Short definition from Wiktionary

Adjective

1. 1
   Excessively sweet, emotional, nostalgic; cheesy; mushy. (British equivalent: soppy)
2. 2
   Having (a particularly large amount of) sap.
3. 3
   Juicy.
4. 4
   Spongy; Having spaces in which large quantities of sap can flow.
5. 5
   Musty; tainted; rancid.