Water Under The Bridge

Forth Rail Bridge
Originally uploaded by Duncan_Smith.

The expression water under the bridge is a way to refer to past history, events that are over and done with. In a subtle way, this expression has a slightly negative tone or unfortunate connotation, to overcome regrets and offer foregiveness. Perhaps you bad luck and lost a little money gambling. In order to move on with your life you might say, it was water under the bridge. Or if you had an argument with a friend and you want to forgive and forget it, then you say the argument was water under the bridge. Life does go on. Go with the flow.