McDonald's McGuffin Sandwich

Yes, it's the new McDonald's McGuffin Sandwich, and everybody wants it! In fact, everyone is chasing everyone else around, trying to steal it. (The Alfred Hitchcock "McGuffin", the thing everybody wants that drives the plot of a spy movie, would make a great name for a McDonald's sandwich, wouldn't it? And they could use Hitchcock in their ad for it, explaining that it's the thing everyone wants. And who better to advertise fast food than a fat guy?)