make water

verb2

1. •
   (euphemistic) To urinate.

   • For, by the fundamental Laws of the Realm, it is Capital in any Person, of what Quality soever, to make water within the Precincts of the Palace. — 1726
2. •
   (Of a ship or other vessel) to admit water; to leak.

   • “That patch we put on the cylinder head’s blown out, sir,” he reported, “and she’s makin’ water fast for’ard on the port bow.” — 1913