Persons dwelling on opposite sides of a river Forsyth derives these words from the Latin rivalis, a riverman Caelius says there was no more fruitful source of contention than river-right, both with beasts and men, not only for the benefit of its waters, but also because rivers are natural boundaries Hence Ariosto compares Orlando and Agrican to two hinds quarrelling for the river-right (xxiii 83)
Traditionally, Sydney Uni have been MAD's biggest rival, with the two unis regularly meeting in the Grand Finals of Australs (where they got us in 1999, but we got revenge in 2000) and Worlds (where we beat them in 1999) There's also a healthy sense of competition between MAD and MUDS, the two big Victorian debating clubs