‘mountain dew’: meanings and origin

Britain, 1747: dew of the kind that settles on mountains—Scotland, 1816: whisky or other spirit, especially when home-made or illicit (originally in reference to whisky distilled in the Highlands, i.e., in the mountainous region of Scotland)

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‘dinosaur juice’: meaning and origin

USA, 1977—petroleum, and any liquid derived from petroleum used in a vehicle powered by an internal-combustion engine—perhaps from popular association of ‘dinosaur’ with ‘fossil fuel’

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‘penny puzzle’ (sausage): origin and early occurrences

UK, 1882—‘penny’ refers to inexpensiveness, and ‘puzzle’ to the mysterious nature of the ingredients—perhaps also in humorous allusion to ‘penny puzzle’ in the sense of a puzzle-card sold on the street for one penny

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‘penny-a-liar’: meaning and origin

UK, 1839—jocular variant of ‘penny-a-liner’ (i.e., a journalist who was paid at the rate of a penny a line, a person who produced mediocre journalistic work) with the implication that such journalists fabricated falsehoods

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‘infotainment’: early meaning and origin

USA, 1937—informative material presented in an entertaining way at working-meetings (and later at other types of gatherings) organised by Shell Oil Company—a blend of ‘information’ and ‘entertainment’

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‘to walk the plank’: meanings and origin

late 18th century, in the context of piracy: to walk along a plank placed over the side of a ship until one falls into the sea—hence, figuratively, early 19th century: to be forced to resign from one’s office or position

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