Anyone who is into fashion or Sex and the City knows about the time when Carrie fell flat on her face in the middle of the runway during the fashion show. So that's what it is its when you fall in the middle of the runway during a fashion show.
n. software that is no longer sold or supported by the original publisher / developer, often found as free downloads on the internet because it cannot be obtained elsewhere. Not legal, but often seen as morally acceptable because the company that made it is no longer selling the title, nor releasing it as freeware, therefore abandonware is "keeping the gamealive", so to speak.
Doom II is not abandonware because idstill sells it, while The Incredible Machine is not sold, therefore is abandonware.