No: HPFGUIDX 14495 B.K.:"Not only that but "Mug" is British slang for someone who "doesn't get it." How do we know Rowling didn't come up with Mugblood before "Muggle" ?" Do the British editions use the word "Mugblood?" If they do, it makes more sense. The American editions use "Mudblood." I wish I had the British editions.