Definify.com
Webster 1913 Edition
Dido
Di′do
,Noun.
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.