Green’s Dictionary of Slang

(UK black) a ‘bad’, i.e. promiscuous girl.

2014		Grizzy ‘Mandem Salute’ 🎵 Like that girl give backshot / That girl give ucky (badders).
2017		410 ‘Crash’ 🎵 Badders on me, just slop it / Den I pass it onto my bro.