乱らん丁ちょう本ぼんMeanings1nounmisbound book; book with pages out of orderRefers to a book where pages are bound in the wrong order, a common defect in book production.買かった本ほんが乱らん丁ちょう本ぼんだったので、交こう換かんしてもらった。The book I bought had pages out of order, so I got it exchanged.