/ ˌhɪgldi ˈpɪgldi; NAmE / adverb
( informal ) in an untidy way that lacks any order :
Files were strewn higgledy-piggledy over the floor.
► higgledy-piggledy adjective :
a higgledy-piggledy collection of houses
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WORD ORIGIN
late 16th cent.: rhyming jingle, probably with reference to the irregular herding together of pigs.