Facetious \Fa*ce"tious\, a. [Cf. F. fac['e]tieux. See
   {Facetiae}.]
   1. Given to wit and good humor; merry; sportive; jocular; as,
      a facetious companion.
      
[1913 Webster]


   2. Characterized by wit and pleasantry; exciting laughter;
      as, a facetious story or reply. -- {Fa*cetious*ly}, adv.
      -- {Fa*cetious*ness}, n.
      
[1913 Webster]

facetious
     adj : cleverly amusing in tone; "a bantering tone"; "facetious
           remarks"; "tongue-in-cheek advice" [syn: {bantering}, {tongue-in-cheek}]

40 Moby Thesaurus words for "facetious":
   Attic, biting, blithe, brilliant, clever, comic, comical, droll,
   funny, humorous, humorsome, jesting, jocose, jocular, jocund,
   joking, joky, jolly, joshing, jovial, keen, keen-witted, laughable,
   ludicrous, merry, mordant, nimble-witted, pointed, pungent,
   quick-witted, rapier-like, salt, salty, scintillating, sharp,
   smart, sparkling, sprightly, whimsical, witty