Backstairs & Ullages

Once, a haggard man from down County,
Found a brand new bottle of whiskey!

The cork was still intact,
But alas! What backstairs1 act! —

The ullage2 made him very unhappy!

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Notes:
1backstairs – secret, underhanded, or scandalous
2ullage – the amount by which the contents fall short of filling a container, as a cask or bottle.