This is a kind of clothing. A skirt is similar to a tuxedo. The front is short and the back is long. From the front, it is slender legs, and from the back, it is a long skirt.
There are many design details of dovetail skirt. The front incision can be short, even or curved, or it can be an irregular incision. The tuxedo originated in Britain, originally as a formal suit for nobles and soldiers, and later gradually evolved into a fashion style suitable for various occasions.