He must be going soft in the head.

他一准是脑子出毛病了。

《牛津词典》

Sometimes tha' looks fair soft in th' head.

有时你怎么看起来脑子有问题的样子。

youdao

The size of small child, it has a soft torso with a bald head, a doll-like face, and stumps in place of limbs. It looks like an overgrown fetus.

Telenoid有点卡通的设，和小孩子一般大小，拥有柔软的躯体，光秃秃的脑袋，娃娃一般的脸蛋，四肢残缺，像一个过度生长的胎儿。

youdao

You do not have to be totally soft in the heart and head to regret such unique places becoming more like each other and more like everywhere else.

ECONOMIST: Pukkah hotels | The