(Sun) 1. The state of being heads down in order to finish code in time for a demo, usually due yesterday.
2. <games> (Or "attract mode") A mode in which video games sit by themselves running through a portion of the game. Some serious apps have a demo mode they use as a screen saver, or may go through a demo mode on startup (for example, the Microsoft Windows opening screen - which lets you impress your neighbors without actually having to put up with Microsloth Windows).
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Nearby terms: demo « demodulate « demodulation « demo mode » demon » Demon Internet Ltd. » DeMorgan's theorem