I hadn't heard that. Many Dommes call themselves Goddesses. I've never heard it limited to BBW's. It seems like the founder of that group calls herself Goddess Nancy and just calls all the women at her parties goddesses. Even urban dictionary doesn't have this as a euphemism for BBWs. Not saying it's not so, but I'm pretty big in the fetish community and I'm pretty sure if I told anyone I know I was going to a goddess party, they wouldn't associate that with BBW.