brain candy 让脑袋放松的事物，它的意思是指那些能让“脑袋放轻松的事物”，脑袋就像吃了糖一样，放松起来。

【例句】
The play won't make you think too hard about the meaning of life or the human condition, but it's a nice little piece of brain candy all the same.
那部戏不会让你苦思人生的意义或者是人类的处境，相反却能让大脑放松一下。

Most video games are just brain candy.
大多数电子游戏都只是让人取乐的东西。