别跟那个笨蛋争论了，他就是个蠢货。

Don't argue with that ___bird-brain, he's just a silly person.

他居然把牛奶放进橱柜而不是冰箱，真是个没脑子的家伙。

He put the milk in the cabinet instead of the fridge—what a ___bird-brain!