1.get the ball rolling开始 (来源：英语麦当劳－英语快餐EnglishCN.com)

     Let's get the ball rolling.让我们开始吧。

     2.get on the ball用心做

     If you hope to keep your job, you'd better get on the ball and meet the deadline.

     如果你还想要你的那份工作，你最好用心做，赶上最后期限！

     3.lady-killer帅哥

     He's a real lady-killer. 他是个不折不扣的帅哥。

     4.lay off停止，解雇

     Lay off! I don't need you to tell me what to do!

     别再讲了!我不需要你告诉我怎么去做！

     5.knock it off=cut it off 停止

     Knock it off! I'm trying to get some sleep.

     别吵了！我正想睡觉呢！