Brain fade refers to a temporary inability to concentrate or think clearly. When your mind just goes blank, or when you know the answer but just can't say it, you are suffering from brain fade.

“脑抽”指短时间内无法集中注意力或者清醒思考。如果你大脑一片空白，或者明明知道答案却说不出来，那么你就是“脑抽”了。

For example:

Prime Minister David Cameron blamed brain fade when he accidentally announced his footballing allegiance to West Ham United rather than Aston Villa.

卡梅伦首相说，他误把自己支持的阿斯顿维拉球队说成西汉姆联队，这全是脑抽惹的祸。