背信棄義
Put the cart before the horse.
Turn topsy-turvy.
eg:Writing a book review before you have read the whole book is putting the cart before the horse.
中英俚語俗語來源:大學:“物有本末,事有終始。”
同義詞:輕重倒置 Turn things upside down.
反義詞:撥亂反正 Put things back to order.