In 1978 with the publication of "Fat is a Feminist Issue" by Susie Orbach.  "For many women, compulsive eating and being fat have become one way to avoid being marketed or seen as the ideal woman," she writes. In other words, what your fat says about you, is: "Screw you!" "Fat expresses a rebellion against the powerlessness of the woman," says Orbach.  https://www.theguardian.com/books/2005/oct/11/gender.society