Corsets

yes… but it takes some weird training…

Tightlacing (also called corset training and waist training) is the practice of wearing a tightly-laced corset to achieve extreme modifications to the figure and posture and experience the sensations of a very tight corset. Those who practice tightlacing are called tightlacers. Some tightlacers call the corsets they wear training corsets.

The most frequent aim of tightlacing is a slim waist. Depending on the silhouette desired, the shape of the ribcage may be altered as well. Wearing a corset can also change the bustline, by raising the breasts upwards and shaping them, flattening the stomach, and improving posture. However, these effects are only temporary and will be lost on removing the corset. Indeed, excessive corset wearing has been claimed to weaken certain muscles, making it more difficult to maintain posture without a corset.

Although some tightlacers aim to get their waists as small as possible, others prefer to reduce their waists to a certain point and go no further as they consider that proportion and aesthetics are more important than achieving the smallest possible measurement. For example, cross-dressing males may seek to make a more feminine-appearing waistline through tightlacing, but do not want to make their waists too small, as this would look unnatural.

http://en.wikipedia.org/wiki/Tightlacing