-nēˌizəm noun
( -s )
Etymology: cockney (I) + -ism
1.
a. : cockney manners, speech, or attitudes
b. : the writing or the qualities of the writing especially the poetry of the 19th century English writers John Keats, Percy B. Shelley, William Hazlitt, and Leigh Hunt — used disparagingly by some contemporaries, especially the Scottish critic John Lockhart
2. : a feature of cockney dialect
cockneyisms found in London records