expression, noun which may take the genitive case particle 'no'
confused; chaotic; jumbled; upside-down
Describes a state of great confusion or disorder, often with things turned upside down or in a jumble. Used as a set phrase, often with の to modify a noun.
引っ越しの準備で部屋が上を下への大騒ぎだ。
With preparations for moving, the room is in utter chaos.
突然の来客で家中が上を下へになった。
The whole house was turned upside down by the unexpected visitor.