Green’s Dictionary of Slang

1. (S.Afr/W.I.) money.

1997–2001		Online Sl. Dict. 🌐 ching n 1. money. (‘That is worth some big ching.’).
2016		Star (Jamaica) 22 Feb. 🌐 I’m not got at maths, but a whole heap of chi-ching dat!

2. £5; a £5 note.

2000

J.J. Connolly Layer Cake 12: People were begging to pay three ching to party in a field up by the M25.