Teddy: A combination of camisole and panties in one piece. May be fitted to the body, or loose. Variety of styles include body briefer: a fitted teddy, may also provide smoothing and shaping, or teddiette: teddy with detachable garters. Worn either under clothing, or as sleepwear.

Well, the dictionary says thata Teddie is "A woman's undergarment combining a camisole top and panties". I belive that it is closer to combination of the Bustier and panty. Most Teddies come with underwire support, adjustable straps and are very form flattering.