Green’s Dictionary of Slang

1. (UK Und.) shoplifting.

1857

‘Ducange Anglicus’ Vulgar Tongue 44: Working at the hoys and coreing Shoplifting.

2. (US Und.) stealing.

1904

‘Number 1500’ Life In Sing Sing 254: Working. Stealing.

3. (drugs) selling crack cocaine.

2001

ONDCP Street Terms 23: Working — Selling crack.