To settle ones business.
1837. I thought I had fixed your flint yesterday.Knick. Mag., ix. 363 (April).
1840. Their manners are rude; they want their flints fixed for em.Haliburton, The Clockmaker, iii. xii. (N.E.D.)
1843. Take it easy, Sam, says I; your flint is fixed.Sam Slick in England, chap. ii. (Bartlett).
1843. Here s a gentleman whose flint wants fixing.Knick. Mag., xxii. 136 (Aug.).
1847. Phil. Stranger, if you dont shet your mouth a little closer than a Gulf clam, Ill fix your flint in short order.J. K. Paulding, American Comedies, p. 197 (Phila.).