The Collaborative International Dictionary of English v.0.48:

Dido \Di"do\, 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]

WordNet (r) 3.0 (2006):

Dido
    n 1: (Roman mythology) a princess of Tyre who was the founder
         and queen of Carthage; Virgil tells of her suicide when she
         was abandoned by Aeneas

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "dido":
   antic, bauble, bibelot, caper, curio, frolic, gewgaw, gimcrack,
   lark, monkeyshine, shenanigan, shines, tomfoolery, toy, trick,
   trifle, trinket, whatnot