Tutu
From wipipedia.org

A tutu is a skirt, originally worn by ballet dancers but now widely seen in fetish clothing. It is fairly short and sticks out, either because it is supported by wires or because it is made of very stiff, starched material. In consequence, it is from certain angles very revealing, often more so than the shortest of ordinary miniskirts. This was originally to allow female dancers maximum freedom of movement, but especially in a fetish context has voyeuristic aspects.