Green’s Dictionary of Slang

trash adj.

1. (US campus/gay) sexually promiscuous.

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[US]Eble Campus Sl. Mar. 9: trash – sexually promiscuous [...] Miss Thing is trash.

2. see white trash adj.

In phrases

trash (’n’ ready) (adj.)

(W.I./UK black teen) attractive, fashionable, trendy.

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[WI]Francis-Jackson Official Dancehall Dict. 52: Trash well-dressed. [Ibid.] 53: Trash ’n’ ready well dressed and ready to go: u. ’im look trash ’n’ ready.