英文：get out of bed on the wrong side (v.) / get out of the wrong side of the bed (v.)
說明：這兩個成語是美國、英國和澳洲共通的講法，但美國還使用 to get up on the wrong side of the bed 來表達相同的意思，即「(早上一起床就) 心情不好」，也就是「起床氣」。
例句：
- What’s the matter with you? Did you get out of bed on the wrong side? (你到底怎麼回事？你有起床氣嗎？)
- A: Why are you getting mad at me? Did I do anything wrong? (你幹嘛對我發脾氣啊？我做錯了什麼嗎？)
B：Sorry, I got out of the wrong side of the bed. (對不起，我有起床氣) - Thomas, you sure are irritable today – did you get up on the wrong side of the bed this morning? (湯姆斯，你今天實在暴躁 － 你今天早上一起床就心情不好嗎？)