Definition
To search thoroughly for something, often resulting in a state of disarray.
翻個底朝天（形容彻底搜尋）
They turned the entire house upside down, but still couldn't find the keys.
他們把整個房子翻了個底朝天，但還是找不到鑰匙。
The police turned the suspect’s apartment upside down, hoping to find evidence.
警方把嫌疑人的公寓翻了個底朝天，希望能找到證據。
I turned my entire backpack upside down to find my passport.
我把整個背包翻了個底朝天，想找到我的護照。