Blackleg
Defined in 3 dictionaries — Bouvier (1914), Black's (1910), Anderson (1889)
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
A professed gambler, a person who makes a business of betting — not necessarily dishonest, though disreputable: 3 H. & N. 376; 31 L. T. O. S. 217, per Pollock, C. B. In the same case Watson, B., thought the word had no precise signification; but Martin and Br am well, BB.,
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A person who gets his living by frequenting race-courses and places whore games of chance are played, getting the best odds, and giving the least he can, but not necessarily cheating. That is not indictable either by statute or at common law. Barnett v. Allen, 3 Hurl. & N. 379.
A Dictionary of Law
William C. Anderson · 1889
A person who gets his living by frequenting race-courses and places where games of chance are played, getting thp best odds and giving the least he can, but not necessarily by cheating. 2