Corset

[Rihanna]

In the Middle Ages, a gown or basque of which the body was
close fitting, worn by both men and women.

[Zipporah Schumaker]

a tight piece of underwear worn on the middle part of a womans body to make her waist appear smaller, especially in the past

[Mark Zuckerberg]

A womans tightly fitting undergarment extending from below the chest to the hips, worn to shape the figure.