Definition
This idiom indicates that if a certain event occurs, someone will be extremely angry, and there will be serious negative consequences.
将有麻烦
If you lose my tools again, there'll be hell to pay.
如果你再次弄丢我的工具，后果会很严重。
If this report isn't finished by the deadline, there'll be hell to pay.
如果这份报告没有在截止日期前完成，后果会很严重。
If she finds out we ate her cake, there'll be hell to pay.
如果她发现我们吃了她的蛋糕，后果会很严重。