1.
to make a place untidy when looking for sth :
The police turned the whole house upside down looking for clues.
2.
to cause large changes and confusion in a person's life :
His sudden death turned her world upside down.
1.
to make a place untidy when looking for sth :
The police turned the whole house upside down looking for clues.
2.
to cause large changes and confusion in a person's life :
His sudden death turned her world upside down.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005