Etymology

napoo

N1A1P3O1O1

Today it means: Finished, dead, no more, gone; non-existent. Full definition →

First used 20th c.
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The story

World War I British and ANZAC army slang, probably a corruption of French “il n′y a plus” (“there is no more”).

First known use, by meaning

  • from 20th c. Finished, dead, no more, gone; non-existent.
  • from 20th c. Dead.

Etymology from Wiktionary, CC BY-SA 4.0.