To focus on the activity in front of you and avoid all distractions; to "lock in" and get your work done.
When Doc Miller's students started fooling around in class, she told them to "get frosty," so they would start paying attention and get their work done.
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.