Upside-down (adjective)

The position or state of being inverted with the upper side facing downward.

Origin:

From up- (prefix meaning "toward a state of being inverted") + side-down (phrase meaning "the position or state of being inverted with the upper side facing downwar.d")

Examples:

1. The upside-down cake is a popular dessert.
2. She was hanging upside-down from the monkey bars.
3. The picture was upside-down on the wall.
4. The kids were having fun turning the room upside-down.
5. He turned the bottle upside-down to pour the last drop.