exists and is an alternate of . Stupid is as stupid does indicates that a person is judged stupid by the stupid acts they commit. A1. The phrase beauty is as beauty does is a common southern expression. It conveys the notion of judging someone on their actions as opposed to superficial appearance. The mom (played by Sally Fields) in the movie Forrest Gump twisted this saying into stupid is as stupid does as way of placating her slow-witted son. It is sort of a meaningless expression, and generated a laugh at theaters in the south.