The Collaborative International Dictionary of English v.0.48:

Carousal \Ca*rous"al\, n. [See Carouse, but also cf. F.
   carrousel tilt.]
   A jovial feast or festival; a drunken revel; a carouse.
   [1913 Webster]

         The swains were preparing for a carousal. --Sterne.

   Syn: Banquet; revel; orgie; carouse. See Feast.
        [1913 Webster]

WordNet (r) 3.0 (2006):

carousal
    n 1: revelry in drinking; a merry drinking party [syn:
         carouse, carousal, bender, toot, booze-up]