Costermonger a secret language, a code which only other costermongers understood. In her book, "Shadows of the Workhouse", Jennifer Worth observed that "Costers... spoke to each other almost entirely in back slang; incomprensible to an outsider." Many costermongers also used "rhyming slang"; where any word can be substituted with another word that rhymes with it. Examples of rhyming slang include: "tin lids" or "dustpan lids" for "kids"; "jimmy grant" for "emigrant"; "apple and pears" for "stairs"; "rubbidy dub" for "pub" and "trouble and strife" for "wife". The selection of rhyming words often suggested a symbolic association. For example, a "sorrowful tale"
Sparrows Can't Sing is a comedy attempting to provide a representation of Cockney life in the East End of London in the early 1960s. A collection of typical characters such as people at the local pub, local tarts, Jewish tradesmen, spivs and others are portrayed, (and possibly larger than life). The dialogue is a mixture of Cockney rhyming slang, London Yiddish, and thieves' cant. "The New York Times", in its review said "this isn't a picture for anyone with a logical mind or an ear for language. The gabble of cockney spoken here is as incomprehensible as the reasoning of those who speak