A good game to play in a car or at a restaurant. Each player takes turns naming a type of cheese; anyone who can't, or who names a duplicate, is derided.
A more linear, challenging variant requires that the cheeses be named in alphabeteical order, without skipping (i.e., american cheese, brie, cheddar cheese, and so on).
This game has an uncountable number of variations, gotten by replacing the set of cheeses with some other set, say capitols of the world.