My friends and I call them "ropey marshmallows" for that reason. This was underscored in an advert I saw. There were "sexy" people walking across a street and getting attention from passersby. The men were lightly muscled (the beauty standard here is just "slim") and the women actually jiggled. Oh, they were slim, don't get me wrong, but their body fat was so high that they jiggled as they walked despite being slender.