spoonerism Definition

spoonerism
noun

1. An accidental slip of the tongue where the positions of the first sounds in a pair of words are reversed, such as par cark for car park or shoving leopard for loving shepherd, and which often results in an unintentionally comic or ambiguous expression. See also metathesis.

Etymology: Late 19c: named after Rev. W A Spooner (1844‐1930), an English clergyman, educationalist, and dean of New College, Oxford, whose rather nervous disposition led him to make such slips frequently and who became renowned at Oxford for doing so.