老鼠屎

Example: : Jimmy is the rotten apple that spoils the barrel in my class, I wish I didn´t have to be his teacher all year.

例句：吉米是班里的老鼠屎，我希望今年不用作他的老师。

They were being closed down today because a large amount of rat droppings was found in their food supplies.

结果我发现这家餐厅关门了，原因是他们发现食材供应商那里有大量的老鼠屎。

F4´s Ken Chu wrote on his Sina Weibo micro blog the reunion would not take place because of a ´mouse shit´.

F 4成员朱孝天在自己的微博中表示，F4难以重聚的原因是“有一颗老鼠屎在”。

Scott: It just goes to show that one rotten apple spoils the barrel. Now we all have to carry a pass and sign in every evening.

史考特：这证明了一粒老鼠屎，坏了一锅粥。现在我们每晚都必须带通行证还要签到。

My mom and dad were also very particular about the friends I went out with, always quoting the maxim the ´one rotten apple could ruin a whole barrel of apples.´

我爸爸妈妈对和我一起出去的朋友也很挑剔，并常引用格言说：“一颗老鼠屎坏了一锅粥。”