Irish phrase

Posted by David on February 23, 2009 at 10:12

There is a phrase, I believe, that has to do with a river or county in Ireland. It was a boundary that separated the English. I think the phrase expresses the idea of the approach to or dangerous crossing of a boundary.

Does this ring a bell with anyone? What is the phrase, and its origin?

• Irish phrase Graham Cambray 23/February/09