Definition of potomania in US English:

potomania

noun

  • Originally: †morbid craving for alcohol, dipsomania (obsolete). In later use: excessive consumption of water, polydipsia; (also) water intoxication, especially when caused by excessive consumption of beer.

Origin

Mid 19th century; earliest use found in Robert Mayne (1808–1868). From ancient Greek ποτόν drink, use as noun of neuter of ποτός drinkable (from an ablaut variant ( o -grade) of the Indo-European base of πίνειν to drink + -τός, suffix forming verbal adjectives) + -mania.