Pretty self-explanatory, a character wearing some kind of corset or waist-crushing clothing. This can have a variety of uses. Inhibiting movement, creating a strong hour-glass body-shape, or even locking down clothing under it.
Soviet Survival Suit by MrAgent
Soviet Survival Suit by MrAgent (Archive Link) Lovely little latex encasement story by MrAgent that follows the female main character exploring some abandoned urban areas in Russia. Finding some kind of lab, managing to squeeze past the half-closed doors. Inside, she finds some sort of full-body garment, with an attached helmet, made out of some durable rubber material. Unable to stop her curiosity, she begins undressing and puts on the suit, wanting to find out what in the world this garment had been made for… ...