A classic geek/SF story from 1955 by Eric Frank Russell. The offog is missing from ship's stores, and the inspector is coming; what to do, what to do?
In actual fact it wasn't really missing. So much the worse. But read the story.
Spoiler content below: select it to see it.
DrBacchus said the "Nom d'un chien!" was a bit too much of a giveaway; I never even noticed it before.