Bilge 01 : (1) Bottom of the hull near the keel. (2) To fail an examination. (3) Bilge water is foul water, so to apply the term to something implies that it is worthless
Compass (The National Training Portal of The U. S. Naval Sea Cadet Corps), appendix I, Glossary, VA, USA 2012. http://compass.seacadets.org/pdf/nrtc/bmr/14325_in d.pdf, (Mrtm/Nav - Amer) {558}