A mysterious chemical oft used during the Victorian era in the British Isles for foolhardy experiments involving sound manipulation and live dogs.
Also, its inherent preserving properties mean that japsnutsteeplebasedacidwater is ideal for rubbing into shallow wounds and teak furniture.
Its opposite is: Chinksboltsparapetbasedalkalifire, which has no uses at all.
Pass me the Japsnutsteeplebasedacidwater, would you? There's a good fellow.