The butted end of a log.

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1830.  [Dixon H. Lewis of Alabama] weighs little short of 450 lbs., and is familiarly known as the But-cut.Northern Watchman (Troy, N.Y.), Oct. 19. [John Quincy Adams styled Mr. Lewis “the Silenus of the House,—a Falstaff, without his wit and good humour.”]

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1840.  Nebuchadnezzar, the King of the Jews, couldn’t beat him at a speech: he’s the butt cut of Democracy.—John P. Kennedy, ‘Quodlibet,’ p. 190 (1860).

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1851.  In two hours more he [your horse] won’t be able to step over the butt cut of a broom straw.—J. J. Hooper, ‘Adventures of Captain Simon Suggs,’ &c., pp. 37–8 (Phila.).

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1878.  The “butt cut” of the tree lies as it fell.—J. H. Beadle, ‘Western Wilds,’ p. 143.

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