Definition of "gyal"

It's cold: there's a new top gyal on road / Running t'ing, running t'ing, running t'ing – everything: oh, you've been told

2006, “A Little Bit of Shhh”, in Vertically Challenged, performed by Lady Sovereign

Man, I wouldn't even try my luck with her / Gyals say I'm boujee

2019, “Vossi Bop”, performed by Stormzy