Words in Pocket - Cockroach Problem
A problem that is nastier than how it initially appears.
What looked like a simple error has ballooned into a cockroach problem that has made the team to rework for almost 2 days.
Real life example:
Well, Terry, Procter & Gamble has a cockroach problem, and, you know, we know what that means; in other words, you’ve got one little piece of bad news, and there is always more, just like those little bugs. —Andy Serwer, “In the Money,” CNN, June 8, 2000