The Oxford Thesaurus An A-Z Dictionary of Synonyms - mumbo-jumbon.

1) gibberish, nonsense, rubbish, gobbledegook or gobbledygook, drivel, humbug, bunkum, double-talk, rigmarole or rigamarole, jabberwocky, blather or blether, poppycock, Colloq eyewash, rot, tommy-rot, hogwash, bilge, bosh, bull, malarkey, claptrap, piffle, US hooey, moonshine, bunk Slang bull, crap, Brit tosh, Taboo slang bullshit: Before he would give me the cheque, the lawyer made me sign something full of legal mumbo-jumbo. 2) spell, incantation, chant, formula, charm, abracadabra, hocus-pocus, rite, ritual, conjuration, magic: She had to sit through all the mumbo-jumbo of her husband's investiture.