It must be an old usage - it's in Compton Mackenzie's book Whisky Galore, when a bar in the Western Isles of Scotland receives a snippy letter, couched in very bureaucratic language, upbraiding them for defeatist talk overheard by their informant during a time of whisky shortage. "Inst" and "ult" are used, much to the locals' confusion.
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Date: 2009-08-04 06:14 pm (UTC)