A “spoonerism” is mispronouncing or switching sounds within a word or between words (accidentally or on purpose).
For example, here are 3 in a row:
You have hissed all my mystery lectures. You have tasted a whole worm. Please leave Oxford on the next town drain.
For more use the DOOR.
• Trashy paperbacks come from the trite side of the racks.
• Is it kisstomary to cuss the bride?
• The man who hated seabirds left no tern unstained.
• Combined charity drives put all the begs in one ask-it.
• Said one blackbird to another: Bred any good rooks lately?
• What is a psychologist? A man who pulls habits out of rats.
Who to blame for starting all this? Rev. Archibald Spooner (1844-1930), once a warden of New College, Oxford. “Spooner is said to have set out to become a birdwatcher, but ended up a word-botcher.”¹
One more. Deacon Frank’s first and last time to be allowed to announce weekend social activities at the parish included: “At 3PM there will be a peter-pull at St Taffy’s.”
A few tore next mime.
¹Richard Lederer, Get Thee to a Punnery (Wyrick & Co., 1988). Don’t blame him for the last one. Punning around goes downhill fast.