Green’s Dictionary of Slang

(UK Black/gang) to stab (to death).

2016		1011 ‘Next Up?’ 🎵 Get round there and ching man up, like anything B get wetted / No face, no case.
2018		Unknown T ‘Mad about Bars’ 🎵 Fence and get chinged.
2021		Guardian 4 Nov. 14/4: ‘I chinged him 25 times.’ [...] ’chinged’ meant stabbed.
2022		Digga D. ‘Lets Say’ 🎵 I’ve hopped off bikes with knives and chinged up guys.