give...a taste of one's own medicine
对…以牙还牙
A: How should I respond to his attack?
我要如何响应他的攻击？
B: I think you should give him a taste of his own medicine.
我认为你应该以牙还牙。

yuppie
* Definition
A young person who works in business, makes lots of money, and buys luxury items; often used in a derogatory way.
* Example
1) Tom is a classic yuppie -- he has an expensive car, an expensive apartment, and an expensive wife.
* Etymology
Comes from the first letters of the phrase 'Young Urban Professional'

What a mess! 
真是乱！
The bird got out of the cage. What a mess in here!
鸟从笼子跑出来了。这里真乱！

yawner
* Definition
Something that is boring or completely uninteresting.
* Example
1) The film was a real yawner -- I fell asleep after the first twenty minutes.
* Etymology
A 'yawn' (when you open your mouth, take a deep breath, and stretch your muscles) is a sure sign that you are sleepy or bored.