底朝天

底朝天

Literally means:

upside down; (search) thoroughly

Actually means:

create great disturbance

It literally means that the bottom comes to the top, i. e. something is turned upside down. It figuratively means that a place is searched or inspected thoroughly, or that a very serious disturbance is stirred up.

事物的最下部变成了最上部。形容搜寻或查找十分彻底，把所有的地方都翻遍了。也形容事情闹得很凶，搞得天翻地覆。