英语俚语：I couldn't care less 我不在乎

I couldn't care less. 
 这句话的意思是「我不在乎」，「缺乏兴趣」（lack of interest），也就是：I don't care at all. 或 I don't give a hoot¹. 例如：
人家如果问： What do you think of the budget-cut?（你对预算削减有何看法？）
你回答： I couldn't care less.（我毫不在乎）
How do you like Mr. Lee's political point of view?（你喜欢李先生的政见吗？）
I couldn't care less.（我才不在乎呢！）
但是有时说话者也有「口是心非」： 例如：
I couldn't care less about the promotion² or pay raise.（我不在乎升级或加薪）
而实际上他是根本在乎升级和加薪的，那么人家也许就会回答说： Yes, you do（care）.

至于 I couldn't care more. 就是「我很在乎」（I care a lot.）或 I care deeply. 同理：
I couldn't agree more.=I totally agree.（我完全同意）
I couldn't please you more.=I did my best to please you.（我尽量使你高兴）
I couldn't be more right.=I am totally right.

但是老外为了「自尊」，不愿强调自己的错误，所以很少人说：
I couldn't be more wrong.
注意：一般人都用否定句，但也有老外把肯定句与否定句互用。

不过，严格来说，I could care less. = I care to some degree.（care 的程度可能减少）
I could care more.=I care some.（care的程度也许增加）（主词可用任何人称代名词：he, she, you, we, they 等。但只用 could，不用 can。）

1 hoot   

n.鸟叫声，汽车的喇叭声； v.使汽车鸣喇叭

参考例句：

• The sudden hoot of a whistle broke into my thoughts.突然响起的汽笛声打断了我的思路。
• In a string of shrill hoot of the horn sound,he quickly ran to her.在一串尖声鸣叫的喇叭声中，他快速地跑向她。

2 promotion   

n.提升，晋级；促销，宣传

参考例句：

• The teacher conferred with the principal about Dick's promotion.教师与校长商谈了迪克的升级问题。
• The clerk was given a promotion and an increase in salary.那个职员升了级，加了薪。