off day

/ˈɒf deɪ/
If someone has an off day, they do not perform as well as usual. 未能发挥正常水平; 状态不佳

noun [专属名词]休息日:一个员工不需要上班的一天。

I'm looking forward to my off day tomorrow.
我期待明天的休息日。

noun [专属名词]状态不佳的一天:一个人在某一天的表现不如平常。

I had an off day yesterday and couldn't focus on anything.
昨天我状态不佳,什么都无法集中精力做。

单词造句:
网友用“Off day”造句精选
A teacher who merely has an off day in the classroom cannot be dismissed for incompetence. 一个教师偶尔在课堂上发挥欠佳不能被看成不称职而遭免职。
I do something stupid, it's an off day. 如果我做了蠢事,那是因为我那天不在状态。
But even on an off day Mr Carey can be dazzling. 但是,即使在创作生涯的低谷,凯里仍然能够让人钦佩不已。