n.; pl. Didos A shrewd trick; an antic; a caper. [ 1913 Webster ]

To cut a dido, to play a trick; to cut a caper; -- perhaps so called from the trick of Dido, who having bought so much land as a hide would cover, is said to have cut it into thin strips long enough to inclose a spot for a citadel. [ 1913 Webster ]

‖n. [ NL. So called in allusion to the classical story of Dido and the bull's hide. ] (Geom.) The curve which on a given surface and with a given perimeter contains the greatest area. Tait.