The Collaborative International Dictionary of English v.0.48:

jiggery-pokery \jiggery-pokery\ n.
   A verbal misrepresentation intended to take advantage of a
   person in some way.

   Syn: trickery, hocus-pocus, slickness, hanky panky,
        skulduggery, skullduggery.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

jiggery-pokery
    n 1: verbal misrepresentation intended to take advantage of you
         in some way [syn: trickery, hocus-pocus, slickness,
         hanky panky, jiggery-pokery, skulduggery,
         skullduggery]