also: ひっちゃかめっちゃか
na-adjective
in a terrible mess; chaotic; completely disordered
Strongly colloquial and onomatopoeic; describes a state of extreme disorder, confusion, or chaos. Often used for physical messes or disorganized situations.
部屋がしっちゃかめっちゃかで、足の踏み場もない。
The room is such a mess there's nowhere to step.
計画がしっちゃかめっちゃかになってしまった。
The plan ended up in complete chaos.