cocknify

Verb

cockneyfy (third-person singular simple present cockneyfies, present participle cockneyfying, simple past and past participle cockneyfied)

1. (transitive) To make cockney; to vulgarize.
   • There certainly are a set of John Bulls, both male and female, who would cockneyfy every spot on the globe they might visit — even the very pyramids...1837, William Rae Wilson, chapter IV, in Notes abroad and rhapsodies at home, page 65