hanky panky

from WordNet (r) 3.0 (2006)

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

from Moby Thesaurus II by Grady Ward, 1.0

31 Moby Thesaurus words for "hanky panky":
      adulterous affair, adultery, affair, amour, conjuration, cuckoldry,
      entanglement, escamotage, eternal triangle, flirtation,
      forbidden love, hocus-pocus, hokey-pokey, illicit love, infidelity,
      intrigue, jiggery-pokery, jugglery, juggling, legerdemain, liaison,
      love affair, monkey business, mumbo jumbo, prestidigitation,
      romance, romantic tie, sleight of hand, triangle, trickery,
      unfaithfulness