Definitions of hugger-mugger:

• noun:   a state of confusion; ritual accompanied by complicated and purposeless activity that obscures and confuses

  Example: "He engaged in the hugger-mugger of international finance"

• adjective:   in utter disorder
• adjective:   conducted with or marked by hidden aims or methods
• adverb:   in secrecy

  Example: "They did it all hugger-mugger"