upside down
verb
°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."
adjective
°Inverted; the wrong way up.
"Would you like some of my upside down cake?"
°Owing more money for something than it is worth; having negative equity.
"He's upside down on his mortgage."
synonyms: underwater