Source : Webster's Revised Unabridged Dictionary (1913)

Dido \Di"do\, n.; pl. {Didos}.
   A shrewd trick; an antic; a caper.

   {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.

Source : WordNet®

Dido
     n : (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