Superclsico is the football match in Argentina between Buenos Aires rivals Boca Juniors and River Plate. It derives from the Spanish usage of "clsico" to mean derby, with the prefix "super" used as the two clubs are the most popular and successful clubs in Argentine football.
Yet some rivalries are more recogniseable than others. Some rivalries are always front page global news and the Superclsico is exactly that. Up there with Inter Vs Milan and Real Madrid Vs Barcelona is Boca Juniors Vs River Plate. For many the Superclsico is the biggest derby in world football.