Merriam-Webster Collegiate Dictionary - carouse

 I. noun  Etymology: Middle French carrousse, from carous, adverb, all out (in boire carous to empty the cup), from German gar aus  Date: 1559  1. archaic a large draft of liquor ; toast  2. a drunken revel  II. verb  (~d; carousing)  Date: 1566  intransitive verb  1. to drink liquor freely or excessively  2. to take part in a ~ ; engage in dissolute behavior  transitive verb obsolete to drink up ; quaff  • ~r noun