spoonerism
/ˈspuːnərɪzəm/Definitions
1. noun
a play on words in which two sounds or words are switched, often with humorous results, especially when two words are said in the wrong order.
“The comedian’s use of spoonerism had the audience in stitches when he said ‘it is kisstomary to cuss the bride’ instead of ‘it is customary to kiss the bride’.”
2. verb
to speak or utter something with a spoonerism.
“She was accused of spoonerizing the phrase when she said ‘a blushing crow’ instead of ‘a crushing blow’.”