它的真实意思可不是字面上的“我不买”，而是“我不相信”。
例如：
You have win the scholarship? I don't buy it.
你得了奖学金，我才不相信你的鬼话。
I don't buy it because it defies logic!
我才不信呢，这不符合逻辑!
表示相同意思的还有：
I don't buy that story.
I don't buy your story.
例如：
I don't buy your story. Try not to have any more sick relatives this week, all right?
我才不信你的鬼话呢。这周尽量不要再有其他生病的亲戚了，好吗?
Don't tell me. 我才不信呢。
例如：
Don't tell me you failed the test!
我才不信你考试挂了呢!
Tell me another one. 我才不信呢!
例如：
"I worked all day yesterday."
“我昨天工作了一整天。”
"Oh yeah, tell me another one!"
“是吗，鬼才信你!”
I must be hearing things. 我一定听错了。
例如：
He's offered to wash the dishes - I must be hearing things.
他主動提出要洗碗盤——我一定是聽錯了。
看到这里可能有宝宝会问了：真正的“我不买”该怎么说呢?
大家可以说： I'm not buying it. 或者 I won't take it.
遇到有人“装X”，你会怎么说?