spoonerism - definition and synonyms

noun [countable] 

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/ˈspuːnəˌrɪz(ə)m/
singularspoonerism
pluralspoonerisms
  1. a mistake in speaking in which someone pronounces some sounds or parts of words in the wrong order and makes a funny change in meaning. For example, someone might sayknow your blowsinstead of ‘blow your nose’.
     Synonyms and related words