Definition
This idiom is used to indicate that people will be punished as a consequence of a negative event.
将有人头落地（表示会有人受到严厉的处罚）
After this major blunder, heads will roll!
出了这么大的纰漏，有人要倒霉了！
If sales continue to decline, heads will roll!
如果销售继续下滑，有人要倒霉了！
There will be repercussions; heads will roll over this scandal.
会有后果的，这起丑闻会让有人倒霉。