A spoonerism results when a pair of vowels, consonants or morphemes in two syllables or words of a phrase or clause are transposed, creating a second phrase or clause with a different, often comic, meaning. A runcibl'd spoonerism results when each of the two components of the spoonerism (which may rhyme) is preceded by a definition, which two definitions do rhyme. Thus, a runcibl'd spoonerism takes the form of the statement of a proportion similar to 'a' : 'b' :: 'c' : 'd,' where 'a' defines the phrase or clause 'b,' 'c' defines the phrase or clause 'd,' and where 'a' and 'c' rhyme. (In the example below, the two elements themselves of the spoonerism feature an eye rhyme.)
An example
('b') Pyramids at Giza ::
('c') pepperoni plopp'd near tools :