spoonerism
/ˈspuːnərɪzəm/noun
- a verbal error in which a speaker accidentally transposes the initial sounds or letters of two or more words, often to humorous effect, as in the sentence you have hissed the mystery lectures斯本内式首音互换错误（常令人觉得滑稽）。
词源
early 20th cent.: named after the Revd W. A. Spooner （1844-1930）, an English scholar who reputedly made such errors in speaking.