Meaning:
“聊天” means “to chat,” and “把天聊死” literally means “to kill off a conversation.” Chinese netizens coined the term to refer to the scenario where a person is so blunt and insensitive in a conversation that the other person finds their talk awkward and is unable to continue the conversation. Those who tend to “kill off a conversation” are often low in emotional intelligence (EQ).
Example:
A: 我长得帅，赚钱也不少，为什么找不到女朋友？
Wǒ zhǎngdeshuài，zhuànqián yě bùshǎo，wèishénme zhǎobúdào nǚpéngyou？
I am pretty good-looking and earn a handsome salary. Why can’t I find a girlfriend?
B: 因为你总是把天聊死。
Yīnwèi nǐ zǒngshì bǎtiānliáosǐ。
Because you are good at killing off a conversation.