We all remember picking up a dictionary as a child and surreptitiously looking up that rude word you heard in the playground, but now Oxford University Press (OUP) will publish the first collection of cheeky words that parents will love too: Roald Dahl’s Rotsome & Repulsant Words, on World Book Day, Thursday 7th March 2019. Naughty words have been making their way into dictionaries since the eighteenth century, and even Samuel Johnson (who omitted most of them) permitted bum to…