spoonerism
spoo·ne·rism
noun
1.
transposition of initial consonants in a pair of words
Origin
From Spooner + -ism, named after Oxford don Reverend W. A. Spooner (1844-1930), who is supposed to have habitually made such slip-ups.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.