Word of the Day - Unobtainium

Excuse! Am off to find the unobtainium! Unobtainium: Noun, a plot critical substance that is shockingly quite difficult to obtain.

Unobtainium is the exotic material that is needed to make the Applied Phlebotinum of a story work. Without it, all your nifty machines and plot-enabling gadgets quit functioning.

 
This author kids you not. A friend (think serious, no nonsense, business type) used the word unobtainium in conversation with me, perfectly un-ironically recently.