WordNet sense 1 (in utter disorder):

disorderly, higgledy-piggledy, topsy-turvy, jumbled

WordNet sense 2 (not neat and tidy):

untidy

WordNet sense 3 (conducted with or marked by hidden aims or methods):

clandestine, cloak-and-dagger, hush-hush, secret, surreptitious, undercover, underground

WordNet sense 4 (secret or hidden; not openly practiced or engaged in or shown or avowed):

covert