There was an item in the NY Post this morning about a "dating site for big-boned women called 'The Big and the Beautiful'."
There's nothing wrong with either "big" or "plus-sized" as substitutes for "fat." A gentle little euphemism never hurt anyone. And we should never blame people for things they have no control over.
But "big-boned" is just transparently dishonest.
It's as if they're saying, "It's not me that's fat, it's just my bones. You see, they're all about four inches thick, which makes me look fat. But that's just an optical illusion. It's not that I sit around eating bon-bons all day and I'm too lazy to get up off my fat ass and exercise -- it's that my bones are big."
Okay, we get it: you have no responsibility in the matter. And since it's completely out of your hands, there's no judgment called for. And you're not a tub of lard -- you're a tub of bones! Hey, maybe we should just call you bony rather than fat.
Come to think of it, it does seem as if you have a rather thick skull.