Helter-skelter things are disorganized, hasty, and appear completely random. Your helter-skelter housekeeping style will definitely not impress your tidy grandmother when she comes to visit.
You can use helter-skelter as an adjective, to describe something disorderly, or an adverb for things that are done haphazardly: "The little car, packed full of clowns, took off helter-skelter down the street." This word has been around since the 16th century, from the Middle English skelte, "to scatter hurriedly." The Beatles made it famous when they named a song "Helter Skelter" on the 1968 record popularly called "The White Album."