also: あまだるい
i-adjective
sentimental; mushy; saccharine
Describes something overly emotional, sweet, or cloying in a sentimental way, often used for movies, stories, or expressions.
あの映画は甘たるくて、見ていられなかった。
That movie was so sentimental I couldn't watch it.
i-adjective
Refers to an excessively sweet taste, often unpleasantly so; can also be used figuratively for overly sweet things.
このケーキは甘たるくて、一口で十分だ。
This cake is sickly-sweet; one bite is enough.