A few weeks ago my other half and I went to a medieval city of Wells, known for its impressive cathedral. This time we decided to go inside and explore the cathedral (not something we often do, since the entry to such places in the UK is by no means cheap). We were just in time for a guided tour, and even though I used to hate the idea of walking anywhere as a group, I started to realise that you learn much more this way. So in we went with our knowledgeable guide. Towards the end of the tour he used the phrase ‘… and Bob’s your uncle’, which at first puzzled me as I’ve never heard it before, but it seemed to mean something like ‘and here you go’.
Indeed, according to World Wide Words, ‘It’s used to show how simple it is to do something: “You put the plug in here, press that switch, and Bob’s your uncle!’
The origin of this phrase is, as usual, quite obscure, but you can find a detailed explanation on World Wide Words’ website and on Wikipedia.
I particularly like this bit: “It is sometimes elaborately phrased Robert is your mother’s brother or similar for comic effect. With his customary whimsical humour, P.G. Wodehouse (one of my favourite writers, by the way) extended it to “Robert’s your father’s nearest male relative”.