1、no-no? =? 禁忌
something that is thought to be unsuitable or unacceptable
Asking a lady her age is a no-no in any situation.
2、chop-chop? =? 快点，赶快 （感叹词）
used to tell someone to hunrry（告诉某人快点）
Chop-chop! We are going to be late!
3、fifty-fifty? =? 对半分，一半一半
We'll share it on a fifty-fifty basis.
4、hush-hush? =? 嘘声，秘密的
kept secret from people（对人保密）
I lost my wedding ring but keep it hush-hush I'm going to buy another one.
5、win-win? =? 双赢
a win-win sutuation or result is one that is good for everyone who is involved
The agreement is a win-win for everyone.