ching, n.³ — Green’s Dictionary of Slang

ching n.³

[? on pattern of later bling n., the sparkle of a cocaine crystal]

(drugs) cocaine.

1996–2003		T. Duckworth Dict. of Sl. 🌐 ching Noun. Cocaine.
2015		I. Welsh Decent Ride 68: Ye goat ching? [...] Ah pure wants tae dae a line.
2020		G. Armstrong Young Team 127: ‘Me n Amanda got a quarter ae ching’.