American Heritage Dictionary of the English Language, 5th Edition
A nautical/shipbuilding term, likely derived from bulge.
Bilge Sentence Examples
In 1872 he suggested the use of caustic lime to prevent the corrosion of iron ships by the bilge water, which he noticed was acid, and in 1878 he began a determination of the velocity of white and coloured light by a modification of H.
Eustace, who had concealed himself in the bilge, was dragged out.
You are the deckhand, the cannon loader, the guy in the crow's nest or the pirate bucketing the bilge.
Well, HE'S dead now, he is--as dead as bilge; and who's to sail this ship, I don't see.