Definition of bacchanalian:

part of speech: adjective

Riotous; pertaining to revelling and drinking.

part of speech: noun

One who indulges to excess in intoxicating drinks; one engaged in noisy and drunken revels.

Usage examples:

• And beside the huge city omnibus there toil, slowly, heavily- laden carts to which are harnessed long trains of huge white Norman steeds, with blue sheepskins upon their backs and bells around their necks, bells which have a rustic simple sound amid all the demoniac clatter of Paris, like the clear voices of children heard in some Bacchanalian revel. Ossip Schubin in "Erlach Court".

• That other great race of ancient times which fattened on the spoils of Europe and Asia- I refer to the Romans- treated the art with less concern, and employed it in a cruder form at the celebration of their victories and Bacchanalian revels. William Johnson Galloway in "The Operatic Problem".