“二”用英文怎么说

“二”用英文怎么说
They are not that thick.他们没那么“二”；
How thick could you get?你还能再“二”一点吗；
Thick heads! 蠢货；2B；
But sometimes, you can be really thick!但是有时候，你可真够“二”的！
PS：“二”：头脑简单、行为愚蠢~