First, before we look at the meaning of this idiom, what is icing?
首先，我们来看看这个习语的意思，什么是icing？
Icing = a sugary [ˈʃʊɡəri] substance used as coating on cakes or cookies (biscuits) to make them look better or to enhance its flavour.
Icing = 一种含糖的物质，常被用来装饰蛋糕或饼干，来让它们好看或者强化其味道。
Icing on the cake的含义简单解释:
Something that makes a good situation even better or a bad situation even worse.
Not only was I offered a higher salary, but the additional bonus I got was the icing on the cake.
不仅是我涨薪了，锦上添花的是我还得到了额外的奖金。
The athlete received a gold medal and the icing on the cake was that he also received a sponsorship deal.
这个运动员得了金牌，锦上添花的是他还得到了一份赞助。
I got fired from my job, but the icing on the cake was when it started to rain while I was walking home.
我被炒了，雪上加霜的是，当我走回家时开始下雨了。
