What Is Vicious Circle?

A cycle that makes things worse for the country every time they go through it.
 
For example,  having no money to spend on population, borrowing loans from developed countries with interest, being unable to repay the loan and falling into more debt, having even less money for the population, needing to borrow more loans...
 
Thats not a very good example, but it was just an example off the top of my head, use that to think of another or elaborate on it...