GNU Collaborative International Dictionary of English

Found one definition

1.       
   Cocagne (?), 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.
   
   [1913 Webster]
   
   
   2. The land of cockneys; cockneydom; -- a term applied to London and its suburbs.  Smart.
   
   [1913 Webster]