subs. (common).1. Spurs; persuaders.
1789. G. PARKER, Lifes Painter, p. 173, s.v.
1811. GROSE and CLARKE, Lexicon Balatronicum, s.v.
2. (cards).The spades suit; also DIGGUMS. BIG DIGGER = ace of spades.
3. (vulgar).The finger nails.
1859. G. W. MATSELL, Vocabulum; or, The Rogues Lexicon, s.v.
1881. New York Slang Dictionary. On the Trail. If you do, returned Bill, I will fix my DIGGERS in your dial-plate and turn it up with red.