A Spoonerism is created by swapping the first letters of two words, named after Edwin Spooner who often switched letters by accident. (It is suspected that Spooner had a brain tumor.)
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A Spoonerism is created by swapping the first letters or sounds of two words, named after [[Reverend Spooner|Rev. William Archibald Spooner]], Warden of New College, [[Oxford University|Oxford]], who had this unfortunate, but often hilarious, habit.