Green’s Dictionary of Slang

business, happenings, events, circumstances.

1898		Kipling ‘Stalky’ in Complete Stalky & Co. (1987) 12: It’s an awful biznai, driving cattle – in open country.
1911		Gem 30 Sept. 13: It looks to me like bein’ a dangewous bisney, deah boy. [Ibid.] 21: But there seems to me to be something fishy about the whole bizney.
1926		Kipling ‘Propagation of Knowledge’ in Complete Stalky & Co. (1987) 230: ‘Good biznai!’ said Stalky.
1939		Bucks. Herald 25 Nov. 10/4: No need to go in the scarlet and top hat bizney for fox-hunting when they can be found on a poultry run.
2005		joseph.macdonald.free.fr 15 Dec. 🌐 One of the most bloody useful things in the whole biznai, I say.