slang, obsolescent Euphemism meaning to urinate. A reference to the practice of pumping out water that accumulates in the bilges of nautical vessels. He stood up and mentioned discreetly that he needed to pump ship before exiting the room to find a water closet.
pump shipurinate. euphemistic
The expression originated in nautical terminology, denoting the pumping of water from a ship's bilges.
1. tv. to urinate. (Crude. From an expression meaning to pump the bilge water from a ship.) He stopped and pumped ship right in the alley.
2. tv. to empty one’s stomach; to vomit. (Crude. Less well known than the previous sense.) After I pumped ship, I felt better.