bacchanalia

Bacchanalia (http://definr.com/Bacchanalia)

     n 1: an orgiastic festival in ancient Greece in honor of Dionysus
          (= Bacchus) [syn: Dionysia, Bacchanalia]
     2: a wild gathering involving excessive drinking and
        promiscuity [syn: orgy, debauch, debauchery, saturnalia,
         riot, bacchanal, drunken revelry]