Green’s Dictionary of Slang

(UK black) an interfering individual; thus as adj.

2017		theculturetrip.com ‘Guide to London Slang 10 Jan. 🌐 Inner – describes someone who is too nosey and up in your life and business.
2022		Digga D. ‘Load Up’ 🎵 (Yo' gyal, you work with police?) / Then why you so fuckin' inner? (Mind your business, bitch).