在网络字典看到这个解释
You can get away with saying anything
as long as you say this directly after
what you say.
例句：
"I,m going to kill you, not really but hey."
不太懂是什么意思，是要翻成我将要杀了你，并不是真的要杀你吗？
抓不到他所要表达的意思Q_Q

然后刀就刺进去了UrbanDictionary的东西别太认真 那的文章跟Joke板差不多要够幽默 推才会比嘘多

啊 虾米@@! 我还蛮相信里面的东西耶XD感谢T大的回复喔^^ but hey感觉有点像 就那样了

有点像是：你猜我是不是认真的捏^﹏^ 呵呵你就想成not really but hey, who knows?然后想像一个阴险的笑脸就是了解释会这样说是因为你会让对方不确定你讲得是玩笑话还是真话然后别太相信那字典的东西XD只有俚语 那边的解释才比较可信

"hey" is used to draw someone's attention. "but" means..Do I really need to explain it? So, "but hey" is usedwhen you want to draw one's attention that you're goingto say something different or even surprising.For example, "We don't have A, B, C... but hey! We havethis one!"

oaadonline.oxfordlearnersdictionaries.com 输入hey-> 3 ...

感谢大家的回答^^