Here's Punchy pretending to be on a phone call so I leave him alone. Not the first time it's happened. When he finally finishes up he turns to me and calls me a piece of string. I said thanks. Little did I know my Cockney lessons were just beginning. 

So here goes: String = String Vest ---> Vest = Pest

A couple of days later I said I was sorry to be a vest. He told me that I'd failed lesson 1.