be no joke
成語所屬單字joke
be no joke — 慣用語
1. used to say that a situation is serious, difficult, or unpleasant and should not
1.慣用語
釋義
不是鬧著玩的；很嚴重
used to say that a situation is serious, difficult, or unpleasant and should not be treated lightly.
例句
Climbing that mountain with a heavy backpack is no joke, even for experienced hikers.
Getting the house ready for the inspection was no joke and took the whole weekend.