1610s, "upper side or surface," from up (adj.) + side (n.). Adverbial phrase upside (someone's) head in reference to a blow to the head is recorded from 1970, U.S. black slang.
雙語例句
1. Salter held the bag by the corners and shook it upside down.
索爾特捏住包的外角，把它倒過來晃了晃。
來自柯林斯例句
2. Tony had an upside-down map of Britain on his wall.
托尼的墻上倒掛了一張英國地圖。
來自柯林斯例句
3. The lid, turned upside down, served as a coffee table.
那個蓋子被翻過來當作咖啡桌。
來自柯林斯例句
4. His eyes were open and everything he saw was upside down.