Just in case people are confused by how to pronounce this, it is oo as in book, not moo. If you are from northern England/Scotland that probably won’t help you

Just in case people are confused by how to pronounce this, it is oo as in book, not moo. If you are from northern England/Scotland that probably won’t help you much though. It’s also used in a range of phrases such as “you silly old chook!”