Wiktionary
panty girdle
n. A type of control garment for women consisting of underpants with a built-in elasticated corset.
WordNet
panty girdle
n. a woman's undergarment that combines a girdle and panties
Usage examples of "panty girdle".
Not handsome- With sudden warmth she realized that if Duke Farnham had half the strong masculine charm his father had, a panty girdle wouldn't be much protection.
She drove into Cocoa Beach and bought a panty girdle, and they rigged that up with the condom.
Then she reached around and down to try and adjust her bustle, an exercise guaranteed to produce the most ridiculous female gymnastics on every world except those where the panty girdle had been invented.