A morbid an uncontrollable craving (often periodic) for drink, esp. for alcoholic liquors; also improperly used to denote acute and chronic alcoholism.
A dipsomaniac is a person with an uncontrollable craving for alcohol, especially alcoholic liquors. It differs from alcoholism in that it is an uncontrolable periodic lust for alcohol, with, in the interim, no desire for alcoholic beverages.