cheating+gamester
1gambler — n. 1. Gamester, player, player for stakes. 2. Professional gambler, blackleg, cheating gamester, card sharper …
2Sharper — Sharp er, n. A person who bargains closely, especially, one who cheats in bargains; a swinder; also, a cheating gamester. [1913 Webster] Sharpers, as pikes, prey upon their own kind. L Estrange. [1913 Webster] Syn: Swindler; cheat; deceiver;… …
3One-upmanship — is the art or practice of successively outdoing a competitor. The term originated as the title of a book by Stephen Potter, published in 1952[1] as a follow up to The Theory and Practice of Gamesmanship (or the Art of Winning Games without… …