dolt

他把牛奶放进微波炉加热了十分钟，真是个蠢货。

He microwaved the milk for ten minutes—what a ___dolt!

别犯傻了，这么简单的问题都答错。

Stop being a ___dolt and get this simple question right.

别相信他，他是个真正的傻瓜，经常在背后耍花招。

Don't trust him, he's a real ___dolt who plays tricks behind your back.