It is when you are titty banging a girl and blow on her chin. This gives her the distinctive look of that magical white wizard that used to pal around with hobbits. Next, tell her to get a towel, point to the wrong door (the one that leads outside,) lock said door, and leave her outside so that the "magic" freezes to her face.
I saw that Gandolf Glacier he gave her. Obviously, he chose to go through the mountains rather than brave the Mines of Moria.