Green’s Dictionary of Slang

(UK black) a machete.

2004		K-Lash-Nek-Off ‘Jankrowville’ 🎵 I keep a ’chete, and stay ever-ready.
2018-20		T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Chete, chetz - machete.