WordNet (r) 3.0 (2006):

double talk
    n 1: deliberately unintelligible gibberish

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "double talk":
   absurdity, amphigory, babble, babblement, balderdash,
   bibble-babble, blabber, blather, bombast, claptrap, drivel, drool,
   fiddle-faddle, fiddledeedee, flummery, folderol, fudge, fustian,
   gabble, galimatias, gammon, gibber, gibberish, gibble-gabble,
   gobbledygook, hocus-pocus, humbug, jabber, jargon, mumbo jumbo,
   narrishkeit, niaiserie, nonsense, pack of nonsense, palaver, prate,
   prattle, rant, rigamarole, rigmarole, rodomontade, rubbish,
   skimble-skamble, stuff and nonsense, stultiloquence, trash,
   trumpery, twaddle, twattle, twiddle-twaddle, vaporing, waffling