Hello Patxi, 'upside down' could literally mean in an inverted position or fashion as mentioned above, however figuratively it means: - confused, topsy-turvy ,muddled as in: an upside down world - a chaotic or crazy manner - in disorderly fashion: "We turned the house upside down looking for the keys."

Something that is the wrong way up. If you turn something over then the side that was up is now underneath.

upside down = head on the floor and feet in the air

倒立

Often Australia is called the land down under or upside down on the globe.