Inverted; turned so that the top is at the bottom.
The pattern resembled an upside down letter W.
In great disorder.
Owing more money for something than it is worth; having negative equity.
He's upside down on his mortgage.
Inverted, so that the top is now at the bottom.
The Union flag was flying upside down, a sign of danger.
In great disorder.
The thief had turned the room upside down.