But equally, someone can be a bad egg.

但同样地，也有坏蛋这一说。

A bad egg, and that's a bad person.

一个坏蛋，就是坏人的意思。

Of course, the opposite of a good egg is a bad egg.

当然了，good egg的反义词就是bad egg。

He's a bad egg. I can't rely on him to do anything!

他是个坏人。我再也不会依靠他做任何事。

How can I trust you to be on time? You're such a bad egg!

我怎么能相信你会准时到？你真是个坏蛋！

If you get a bad egg, and trust me you will get a bad egg, and you are cracking all the eggs in the same bowl, what happens is that bad egg is gonna ruin the rest of your eggs.

如果你得到一个坏鸡蛋， 相信我，你会得到一个坏鸡蛋，而你在同一个碗里打碎所有鸡蛋，结果是坏鸡蛋会毁掉你剩下的鸡蛋。