I'm dead serious! 我是一本正经.
I don't joke. 我不随便开玩笑. I mean it! 我说一不二.
I'm not joking. 我没在开玩笑. Let's not play games anymore. 咱们不要再彼此玩花样. Let's stop this nonsense! 废话少说, 言归正传!
Let's get down to the nitty-gritty. 咱们来讨论一下要点. The party's over. 联欢会结束了.
