adj., when one has a deep, mind-boggling, innovative, and/or philosophical revelation in the middle of the night (usually when trying to get to sleep). Most people will either
a) have to document it somehow before being able to sleep
b) think about it till they bore themselves to sleep
or c) find themselves unable to remember it in the morning, much like a dream.

When you eat dirt for the first time and leave your family to build a shack in the woods