Definition of "napoo"

What shall I do? / My poor old dug-out is napoo.

1918 April, 'R', An elegy on my dugout, when it was done in, published in Four Whistles by D Company of the Scottish Officer Cadet Battalion, quoted in Graham Seal, The Soldiers' Press: Trench Journals in the First World War 2013

“ ‘Very well,’ says I, ‘San fairy ann. Napoo washing — napoo ball.’“ That set ′em to work. Next day little boys were scraping the village over like fowls in a farmyard, getting a chip ′ere an′ a shaving there, an′ making themselves such a nuisance […] .

1920, Punch, volume 158, page 185

One afternoon the corps was due to shift, so that morning the cook said to the Turco, giving him his farewell tin: 'Oh la, la, Johnny, napoo pozzy tomorrow.'

1929 November, Robert Graves, chapter XVII, in Good-bye to All That: An Autobiography, London: Jonathan Cape […], page 237

The war was napoo, fini, and the Rhine the end of the journey.

1964, Pierre van Paassen, To Number Our Days, page 159

‘Hey, Bill, where′s Charles?’‘Napoo.’‘What?’‘Yes. He was out on a listening post and lit a cigarette. Sniper got him.’

1918, Hereward Carrington, Psychical Phenomena and the War, page 69

“The general says that if you are wise you will leave before the cannons come. Otherwise you′ll get ‘napooed,’ ” and he made an expressive gesture. “Compris?”

1918, Roland Pertwee, The Little Landscape: Everybody′s Magazine, volume 38, page 35

I thought a man was lucky if he did not get napooed first trip in.

1918, Hereward Carrington, Psychical Phenomena and the War, page 68

“No,” Merton said shortly. “We sit tight, they find us. If we both go wandering about looking for each other in the middle of the night, we′ll start a battle and the whole plan for tomorrow will be napooed.”

1984, John Masters, Man of War, 1984, US title High Command, page 230

German planes had not only carried out a raid behind our lines, but a long-range shell had actually hit one of the Battalion cookers and “napooed” it completely.

1988, Sidney Rogerson, Twelve days, page 19

“ […] Finish! Napoo!” and he spread his hands expressively, holding the cup upside down with the cloth hanging out of it, before he went on: “But it hasn't come to that yet. […] ”

1939, Ruthven Todd, Over the Mountain, published 1978, page 216