I figure, after what we went through with Sandy, a little lightheartedness is in order. Schnaps (one "p"!) is any hard liquor, and an Idee is an idea. Put the two together and you have an idea that could have originated only in an inebriated brain. It's a bad idea, but one of the less consequential kind: Trying to potty-train your cat may be a Schnapsidee, the invasion of Iraq was not—it was something much worse.