Hunchbacks

In William Shakespeare's Richard III , someone refers to Richard as “that foule hunch-backt toade.” It's the first recorded instance of that term for someone who had a less-than-straight spine, and—putting aside the question of whether Richard was "hunch-backed"—the term gets used in the literature of the next couple centuries to indicate a bad person. We know what a "back" is, but what is a…