carousing

(verb) engage in boisterous, drunken merrymaking. Synonyms: carouse, roister, riot. Example: "They were out carousing last night."

(adj) used of riotously drunken merrymaking. Synonyms: bacchanalian, bacchanal, bacchic, orgiastic. Examples: "A night of bacchanalian revelry." "Carousing bands of drunken soldiers." "Orgiastic festivity."