Expression from Victoria Australia, where there is a major sewerage treatment plant in an outer suburb of Melbourne called Werribee.
Thus any duck in Werribee is said to be in a hell of a lot of shit!
Obviously The name of Werribee can be substituted with the name anywhere with a large sewerage treatment plant or anywhere with large amounts of untreated sewerage.
Construction work, or an installation, of questional means and/or methods that is warranted for as long as the contractor's or subcontractor's tail-lights on his departing work truck are still visible.
This alternaterouting option was, sadly, my idea and will likely come with only a tail-light warranty.