Webster's 1828 Dictionary
SAPPY
a. 1. Abounding with sap; juicy; succulent.
2. Young; not firm; weak.
When he had passed this weak and sappy age -
3. Weak in intellect.
SAPPY
a.[Gr. to putrefy. ] Musty; tainted. [Not in use. ]
Webster's 1913 Dictionary
SAPPY
Sap "py, a. [Compar. Sappier; superl. Sappiest.] Etym: [From 1st Sap. ]
1. Abounding with sap; full of sap; juisy; succulent.
2. Hence, young, not firm; weak, feeble. When he had passed this weak and sapy age. Hayward.
3. Weak in intellect. [Low ]
4. (Bot. )
Defn: Abounding in sap; resembling, or consisting lagerly of, sapwood.
SAPPY
Sap "py, a. [Written also sapy.] Etym: [Cf. L. sapere to taste. ]
Defn: Musty; tainted. [Obs. ]
New American Oxford Dictionary
sappy
sap py |ˈsapē ˈsæpi | ▶adjective ( sappier, sappiest ) 1 informal excessively sentimental; mawkish. 2 (of a plant ) containing a lot of sap. DERIVATIVES sap pi ly |-əlē |adverb, sap pi ness noun
Oxford Dictionary
sappy
sappy |ˈsapi | ▶adjective ( sappier, sappiest ) 1 informal, chiefly N. Amer. mawkishly over-sentimental. 2 (of a plant ) containing a lot of sap. DERIVATIVES sappily adverb, sappiness noun
American Oxford Thesaurus
sappy
sappy adjective See saccharine.
Sanseido Wisdom Dictionary
sappy
sap py /sǽpi /形容詞 1 ⦅米 けなして ⦆〈人 音楽などが 〉感傷的な (⦅英 ⦆soppy ).2 樹液の多い .3 元気のいい, 活気に富む .4 ⦅米 くだけて ⦆間抜けな, どじな .