MEANING: noun:
1. The use of legal, but unethical, tactics in a contest. For example, psychological intimidation, manipulation, distraction, etc.
2. The use of questionable means to gain an advantage.

ETYMOLOGY: From games + sportsmanship. Earliest documented use: 1939.

DAMES MAN SHIP - oxymoronic definition of the Women's Navy Corps

GAMES MANWHIP - ancient spectacle for sadists

GATESMANSHIP - the art of sneaking in without paying