The doctor lifted the woman's spoonerflap and placed it on the mammography machine.
There is a video on YouTube called "Melons Crushing Melons" showing a woman crushing a watermelon with her breast by slamming her spoonerflap into it repeatedly.
A word or phrase created by swapping the initial letters (or first consonant sounds) of two words or syllables to get a new word word or phrase. The spelling doesn't have to be correct, only the pronounciation is important. The term "spoonerism" was named after Reverend W.A. Spooner (1844-1930).