Source : Webster's Revised Unabridged Dictionary (1913)

Cocagne \Coc*agne"\, n. [F. cocagne, pays de cocagne; of
   uncertian origin, cf. Prov. F. couque cake, Catal. coca, L.
   coquere to cook; as if the houses in this country were
   covered with cakes. Cf. {Cook}, {Cockney}.]
   1. An imaginary country of idleness and luxury.

   2. The land of cockneys; cockneydom; -- a term applied to
      London and its suburbs. --Smart.