ca·rouse / kəˈrouz/ • v. [intr.] drink plentiful amounts of alcohol and enjoy oneself with others in a noisy, lively way: they danced and caroused until the drink ran out | [as n.] (carousing) a night of carousing. • n. a noisy, lively drinking party: corporate carouses.DERIVATIVES: ca·rous·al / -zəl/ n.ca·rous·er n.

carouse full draught XVI; drinking-bout XVII. From the phr. drink or quaff carouse (XVI), repr. G. gar aus trinken drink completely.
So carouse vb. XVI.