Which,if my dad was alive today, he'd go, 'You've got to be kidding me.

VOA: standard.2010.05.31

It's mock aggression in the sense that when people laugh they're often teasing, kidding around.

我们知道打闹是装出来的，因为人一笑,我们就知道他们是闹着玩的。

耶鲁公开课 - 心理学导论课程节选

She says, "What? I haven't heard such a thing." "Are you kidding?"

她说，“什么？我从没听过有这种事，你在开玩笑对吗？”

I'm glad 课堂 - SpeakingMax英语口语达人

What-- you guys think I'm kidding?

你们以为我是在开玩笑吗？

哈佛公开课 - 计算机科学课程节选

No kidding, where is this?

我不是在开玩笑,你在哪认识他的

耶鲁公开课 - 古希腊历史简介课程节选

Just kidding. I'll let you off the hook.

开玩笑的，我放过你。

哈佛公开课 - 幸福课课程节选