Definition: A long strip of wood, metal, fiberglass etc, used for various purposes aboard ship, especially one inserted in a pocket sewn on the sail in order to keep the sail flat.
Our batten is wood, 18 inches long, an inch wide and 1/4 thick. It's bends a little, but is stiff.
Like several of our toys, it was discovered some years ago by Becall. She saw it and wondered how it would feel on her bottom. So I showed her. Later, she decided it would work better on her thighs than her bottom. She likes it on her inner thighs close to her tender spot. I prefer it on the front and backs of my legs.