Rhyming slang

Rhyming slang is a form of phrase construction in the English language that is especially prevalent in dialectal English from the East End of London; hence its alternate name, Cockney rhyming slang.

The construction of rhyming slang involves replacing a common word with a phrase of two or three words, the last of which rhymes with the original word; then, in almost all cases, it involves omitting, from the end of the phrase, the secondary rhyming word (which is thereafter implied), in a process called hemiteleia, making the origin and meaning of the phrase elusive to listeners not in the know.