Green’s Dictionary of Slang

1. a home or job, a (domestic) situation.

1867

Sportsman 10 Sept. 2/1: Notes on News [...] [I]t is gratifying to meet him again in his new ‘fixings,’ and in such numerous and good company.

2. furniture.

1884

(con. c.1840) ‘Mark Twain’ Huckleberry Finn 220: The king said it was all the more homely and more pleasanter for these fixings, and so don’t disturb them.

3. in ext. use of sense 2, the trappings of luxury.

1919

J. Buchan Mr Standfast (1930) 691: There was a time when he was the last thing in smartness in the German court – officer in the Guards, ancient family, rich, darned clever – all the fixings.