Cockroach problem is a problem that is bigger than it initially appears.

蟑螂问题指的是比原先看起来还要严重的问题。

You've got one little piece of bad news, and there is always more, just like those little bugs.

你先是收到一条坏新闻，然后坏新闻源源不断地接踵而来，就像那些烦人的小虫子一样。

请看例句：

If you solve the problem earlier, it won't be a cockroach problem.

如果你早点解决这个问题，它就不会比原先还要来得严重了。