Green’s Dictionary of Slang

(UK black) a (large) knife, thus as v. to stab.

2020		Urban Dict. 7 Dec. 🌐 Ying is a big shank that gos on your hip. It is used by uk drillers. ‘Big ying on my hip and he knows what it is’.
2022		Digga D. ‘Secret’ 🎵 I’m chingin’ and yingin’ / He’s dead on the scene (Wet, wet).