a mistake made when speaking in which the first sounds of two words are exchanged with each other to produce a not intended and usually funny meaning

The Reverend William Spooner used to produce spoonerisms such as "a scoop of boy trouts" instead of what he meant to say - "a troop of boy scouts". 威廉•斯普纳牧师过去说话时常将首音误置，如本来想说 a troop of boy scouts，却说成 a scoop of boy trouts。