cock ‧ ney BrE AmE , Cockney /ˈkɒkni $ ˈkɑːk-/ noun
[ Date: 1600-1700 ; Origin: cockney 'male chicken's egg, child treated too well, person who lives in a town' (14-19 centuries) , from cocken 'of cocks' + ey 'egg' (11-16 centuries) (from Old English æg ) ]
1 . [countable] someone who comes from the east part of London, and who has a particular way of speaking which is typical of working-class people who live there
2 . [uncountable] a way of speaking English that is typical of working-class people in the east part of London
—cockney adjective :
She has a broad cockney accent.