The first two may be a bit too British (I'm not sure from where the questioner originates). The third is North American but I certainly hear it a lot in the UK.

[wet:][1] Brit. Inf. Sense #2 "Showing a lack of forcefulness or strength of character"
[moist:][2] Urban Dictionary " "... used to describe an 'uncool' person"
[sappy][3] Inf. chiefly North American Mawkishly over-sentimental [1]: http://www.oxforddictionaries.com/definition/english/wet [2]: http://www.urbandictionary.com/define.php?term=Moist&defid=8181896 [3]: http://www.oxforddictionaries.com/definition/english/sappy

The first two may be a bit too British (I'm not sure from where the questioner originates). The third is North American but I certainly hear it a lot in the UK.

wet: Brit. Inf. Sense #2 "Showing a lack of forcefulness or strength of character"
moist: Urban Dictionary " "... used to describe an 'uncool' person"
sappy Inf. chiefly North American Mawkishly over-sentimental