What does Garrett mean in cockney slang?

In Cockney slang, "Garrett" is a term used to refer to a cigarette. Cockney slang often involves rhyming Words or phrases, where the intended Word is replaced with a rhyming phrase to create a coded language. In this case, "Garrett" rhymes with "carrot," which is why it is used as a substitute term for a cigarette in Cockney rhyming slang.