to take part in a drinking spree or drunken revel
If that death were so near, he would not banquet and carouse and swill amongst the students, as even now he doth — Marlowe
to drink alcoholic beverages heavily or freely
carouser noun
[early French carrousse, from carous completely, all out, in boire carous to empty the cup, from German gar aus trinken to drink all out]