Marshmallow thighs

Marshmallow thighs are when a someones legs are super thick and squishy, like a marshmallow
They are often white which is why its marshmallow thighs, soft and white

Guy: I cuddled with a girl she squished me between her thighs.
Friend: so?
Guy: She had major marshmallow thighs
Friend: Woah! Im so jealous i wish i could feel them!