1. Big headed

大脑袋(傲慢，自大)

He is big headed. = He is arrogant.

他这个人挺傲慢。

例子：Whenever she wears that dress she gets a big head because she thinks it makes her very beautiful.

她只要穿上那套衣服，就有点儿臭美，自以为怪不错的。

2. Bigger fish to fry

有更大的鱼要炸。(有更重要的事要办)

I have got bigger fish to fry. = I have got other more important problems

or things to do.

我有更重要的事要办。

例子：I forgot to eat breakfast because I was late and now I am very hungry but I have bigger fish to fry. I need to have these papers ready for the meeting so I can't eat now even though I am hungry.

我因赶时间没吃早饭，现在饿得很，但我有更重要的事要办。我得把这些开会要用的文件弄好，所以现在再饿也不能去吃东西。

3. Bite off more than one can chew

贪多嚼不滥。

Don't bite off more than you can chew. = Don't promise more than you can do.

别承担你做不来的事。

例子： I told my boss that I would finish the report tomorrow; however, it is taking longer than I expected. I might have bit off more than I can chew.

我告诉老板这篇报告明天写好，结果需要的时间比我想象的多，我也许揽了我做不来的活儿。