Green’s Dictionary of Slang

jink n.¹

money.

c.1840		‘Buy Broom Besoms’ in Holloway & Black II (1979) 46: I eas’d him of his jink, a gathering of green broom.
1902		E.J. Dempsey ‘Mcginty’s Happy Thought’ in Bulletin Reciter 1880–1901 67: They’d not the least taste of the jink — They were sadly in want of the jink!