v. slang. [Of obscure origin.] trans. To bring to an end, stop, desist from (a matter, a practice); to quit (a place). Often imp. stash it! stash that!To stash the glim: to cease using the light. To stash up: to bring to an abrupt end.

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1811.  Lex. Balatr., s.v., The cove tipped the prosecutor fifty quid to stash the business.

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1812.  J. H. Vaux, Flash Dict., s.v., Thus a thief determined to leave off his vicious courses will declare that he means to stash (or stow) prigging…. To stash drinking, card-playing, or any other employment you may be engaged in for the time present. Ibid., Stash it: see Stow it.

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1823.  ‘Jon Bee,’ Dict. Turf, s.v., ‘Stash the glim,’ to put out lights, or to place an extinguisher on the candle.

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1889.  ‘R. Boldrewood,’ Robbery under Arms (1890), 99. The rest of us … as they was sold, stashed the camp and cleared out different ways.

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1903.  W. Craig, Adv. Austral. Goldfields, 229. She is requested to ‘stash’ tragedy and give them comedy.

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1909.  H. G. Wells, Tono-Bungay, III. iv. § 2. 395. She brought her [piano] playing to an end by—as schoolboys say—‘stashing it up.’

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