bilge water

Nautical. bilge(def 1d).

Also called bilge. Slang. foolish, worthless, or offensive talk or ideas; nonsense; rubbish.

Origin of bilge water

First recorded in 1700–10

This shews that the word meant the lower part of the hold; and the bilge-water that collects there.

Chaucer's Works, Volume 5 (of 7) -- Notes to the Canterbury Tales |Geoffrey Chaucer
It smells of bilge-water and greens to the exclusion of all other scents; no ordinary sea air can hope to head against it.

Three Men on the Bummel |Jerome K. Jerome
A quantity of ashes was carried down into the bilge-water pump and obstructed the steam-pump.

The Home of the Blizzard |Douglas Mawson
Everything had been gutted and there was a most horrible smell from a foot or two of bilge-water.

The Secret Service Submarine |Cyril Arthur Edward Ranger Gull

As the bilge-water jets from a ketch when the hold is surcharged, so did the Marquess jet his expletives.

The Life and Death of Richard Yea-and-Nay |Maurice Hewlett