An aggressive, meat-eating, prehistoric sea monster. Its body was composed entirely of mung, and it is believed that it was the size of several football fields. It smelled like shit.
While officially extinct, many still believe that the mungalodon lives on in the depths of the world's oceans.
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.