Green’s Dictionary of Slang

1. rich.

c.1698		B.E. Dict. Canting Crew n.p.: Equipt c. rich.
1719		A. Smith Lives of Most Notorious Highway-men, etc. (1926) II [as cit. c.1698].
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1859		Matsell Vocabulum.

2. well-turned out, well-dressed [20C use mainly US black].

c.1698		B.E. Dict. Canting Crew n.p.: Equipt [...] having new Clothes. Well equipt, c. plump in the Pocket, or very full of Money; also very well drest. The Cull equipt me with a brace of Meggs, c. the Gentleman furnish’d me with a couple of Guineas.
1719		A. Smith Lives of Most Notorious Highway-men, etc. (1926) II [as cit. c.1698].
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1859		Matsell Vocabulum.
1972		D. Claerbaut Black Jargon in White America 63: equipped adj. 1. stylish; fashionable.

3. (US black) emotionally and socially poised.

1972

D. Claerbaut Black Jargon in White America 63: equipped adj. [...] 3. able; capable.

4. carrying a weapon of one sort or another.

1995		J. Cameron Vinnie Got Blown Away 156: Course I went guilty carrying some screwdriver yeah I’m equipped.
2001		N. Barlay Hooky Gear 28: Bein home equipped is almost as good as going equipped.