I have pricked my finger?

Could be "Logology"

(1) The practice and study of word play: that is, the manipulation of meanings, arrangements, sounds, spellings, and other aspects of words and letters. This use of the term logology was popularized by Dmitri A. Borgmann in his book Language on Vacation (1965). Also known as recreational linguistics.

(2) The study of words, or words about words. This use of the term was introduced by Kenneth Burke in The Rhetoric of Religion (1961). According to William H. Rueckert, logology is "the study of the timeless forms and principles of language, and would thus include rhetoric, in its verbal dimension, as well as grammar and poetics" (Encounters With Kenneth Burke, 1994).

It`s a type of "Spoonerism" where a letter or word is transposed ..eg. you are a cupid stunt, cook my sock, a shawl of white instead of yo are a a stupid(I`ll put the stars is, to save Yahoo ploice having to do it) C***....suck my C*** wall of shyte etc.