Green’s Dictionary of Slang

(UK middle class) a pej. generic term for a working-class young woman regarded as overly flashy and socially unacceptable; a female Kevin n.

2001		OnLine Dict. of Playground Sl. 🌐 Sharon and Tracy n. names used together or singly and supposed to belong to girls who are often amoral, usually working class, and always vulgar.
2006		G. Malkani Londonstani (2007) 211: Living it up in Leicester Square with all the tourists, tramps and Traceys.