To settle one’s business.

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1837.  I thought I had fixed your flint yesterday.—Knick. Mag., ix. 363 (April).

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1840.  Their manners are rude;… they want their flints fixed for ’em.—Haliburton, ‘The Clockmaker,’ iii. xii. (N.E.D.)

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1843.  Take it easy, Sam, says I; your flint is fixed.—‘Sam Slick in England,’ chap. ii. (Bartlett).

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1843.  Here ’s a gentleman whose flint wants fixing.Knick. Mag., xxii. 136 (Aug.).

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1847.  Phil. Stranger, if you don’t shet your mouth a little closer than a Gulf clam, I’ll fix your flint in short order.—J. K. Paulding, ‘American Comedies,’ p. 197 (Phila.).

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