Right now, somewhere out there, is the death of Facebook
A solution is supersaturated when it is more highly concentrated than is normally possible under given conditions of temperature and pressure. The classic example is carbonated water used in soda. Under pressure the water can hold more carbon dioxide than it can at atmospheric pressure when you take the cap off the bottle the soda starts to fizz because it is super saturated at the new pressure.
With almost a billion active users, most of whom don’t like it that much, I think Facebook is due for a fizz as people abandon it for the next big thing. (Sorry Google, it’s not G+)