verb. (racing).—To bet recklessly. Hence A PLUNGE = a reckless bet; PLUNGING = gambling for high stakes; PLUNGER = a reckless gambler. [E.g., the Marquis of Hastings, the first so-called. One night he played three games of draughts for £1000 a game and lost all three. He then ‘cut’ for £500 a ‘cut’ and lost £5000 in less than two hours. Benzon (the Jubilee Plunger) lost £250,000 in little more than twelve months.]

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  1880.  Fortnightly Review, 319. PLUNGING was the order of the day.

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  1890.  G. R. SIMS, in Referee, 20 April, ‘The Rondeau of the Knock.’

        One PLUNGER more has had his little flare
And then came to Monday when he couldn’t ‘square.’

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  1891.  Licensed Victuallers’ Gazette, 3 April. The Squire of Kingscote took to PLUNGING and shaking his elbow at baccarat nearly every night.

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  1901.  Free Lance, 9 Feb., 471, 1. Sponging on their friends in order to settle their Stock Exchange “differences.”… Husbands are ruined in a day by the secret PLUNGING of their wives.

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