rattlebrained

adj.头脑空虚的,愚蠢多嘴的

愚蠢的；精神错乱的；健忘的。

形容词

1. He's so rattlebrained that he can't remember anything.
他太健忘了，什么都记不住。
2. The rattlebrained decision she made cost her a lot of money.
她那个愚蠢的决定让她损失了很多钱。