need your head examined idiom humorous (UK also need your head examining)
脑子有问题
If you tell someone they need their head examined, you think that that person is crazy because they have done something stupid or strange.
You need your head examined if you're willing to spend that much on a pair of jeans. 如果你愿意花那么多钱买一条牛仔裤，那你肯定是脑袋有问题。