WordWeb Online

1. [N. Amer, informal] Wet through and through; thoroughly wet
   "soppy clothes";
   - sodden
    
2. [Brit, informal] Effusively or insincerely emotional
   "a soppy novel";
   - bathetic, drippy [informal], hokey [N. Amer, informal], maudlin, mawkish, kitschy, mushy [informal], schmaltzy [informal], schmalzy [informal], sentimental, sappy [informal], soupy [informal], slushy [informal], cutesy [informal], gooey [informal], corny [informal], weepy [informal], cheesy [informal]

Derived forms: soppier, soppiest

See also: cornball [N. Amer, informal], emotional, lovey-dovey [informal], wet