漫不经心的谈话的英文：
Careless talk

careless是什么意思：
adj. 粗心的；无忧无虑的；漫不经心的

The text was corrupted by careless copyists.
原文因抄写者粗心而有讹误。

He is a careless beggar.
他是个粗心的家伙。

He is a careless profligate.
他是个粗枝大叶的浪荡子。

The accident originated from carelessness.
这意外事件是由于粗心而引起的。

The accident was credited to carelessness on the part of the driver.
这起事故是由于驾车人不小心引起的。

talk是什么意思：
n. 交谈；谈话，会谈；闲话，空谈；讲话；说话的方式
v. 交谈；有说话的能力；商讨；说；说闲话；提供情况

Talk Billingsgate
说脏话

They will have a talk at meals.
他们将在进餐时讨论。

That is a talking crow
那是一只会说话的乌鸦。

The talk of the metallic tongue in the tube of Sheng—plausible talk
簧口言语

And will talk in contemptuous tones of the Shark.
它洋洋得意地同鲨鱼攀谈。