Marshmallow: noun A marshmallow is a treat made from a soft and sweet dough made from marshmallow (herbaceous plant).
Said of someone sentimental, soft, cutesy. He's soft like marshmallow, that guy.
Blond marshmallow: insipid writing.
This movie is marshmallow : it's cutesy, bland and sentimental (syrupy).
This song is marshmallow : it's syrup.
Marshmallow band (pink): soft band.