Definition
Used to describe something that is extremely difficult or of very poor quality.
极度困难的，极度难关的
We had the devil's own job finding that hidden village without any maps.
我们费了九牛二虎之力才找到那个没有地图的隐藏村庄。
It was the devil's own job trying to repair the old machine; it was too badly damaged.
修理那台旧机器真是困难重重；它损坏得太严重了。
Yesterday's exam was the devil's own; it was the hardest one I've ever taken.
昨天的考试真是难上加难；那是我考过最难的一次。