Etymology
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jeu d'esprit (n.)
"a witticism," 1712, from French, from jeu "play, game," from Latin jocum "jest, joke, play, sport" (see joke (n.)).
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Queensberry Rules 
drawn up 1867 by Sir John Sholto Douglas (1844-1900), 8th Marquis of Queensberry, to govern the sport of boxing in Great Britain.
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