Green’s Dictionary of Slang

1. in card-games, the five of trumps.

1589		Nashe Martin-Marprelate Tractes in Works I (1883–4) 161: The fiue fingers is a carde of great strength.
1611		Chapman May-Day V ii: For my game stood, me thought, upon my last two tricks, when I made sure of the set, and yet lost it, having the varlet and the five finger to make two tricks.
1674		C. Cotton Compleat Gamester 123: The five fingers (alias, five of trumps) is the best Card in the pack; [...] the Five-Fingers not only wins the Ace of Trumps, but also all other Cards whatever.
c.1850		Duncombe New and Improved Flash Dict.
1873		Sl. Dict.

2. (US Und.) a five-year jail sentence.

1939

Howsley Argot: Dict. of Und. Sl.