slang or colloq. [a. Turk. bosh empty, worthless; the word became current in Eng. from its frequent occurrence in Morier’s novel Ayesha (1834), which was extremely popular, especially in the ‘Standard Novels’ edition 1846.]

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  1.  Contemptible nonsense, ‘stuff’; trash; foolish talk or opinions.

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1834.  Morier, Ayesha, I. 219. This firman is bosh—nothing. Ibid., I. 283. The parts [of the Koran] which are taken from the Christian Bible are divine…. [Ghe other parts] are spurious. They are bosh—nothing.]

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1850.  P. Crook, War of Hats, 19.

        A little rape and incest now and then,
Some nameless bosh—seduction—or crim. con.

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1863.  Kingsley, Water Bab. (1878), 174. And were pure bosh and wind.

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1864.  Miss Yonge, C’tess Kate, xii. 212. Don’t talk bosh out of your books.

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1885.  Illustr. Lond. News, 23 May, 539/2. I can write something that is not bosh.

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  2.  int. Stuff and nonsense! Humbug!

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1852.  Dickens, Bleak Ho., xxi. Bosh! It’s all correct. Ibid., xxiv. Bosh, what’s my head running against!

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