This question already has an answer here:
Recently I came across the expression "dain-bramaged". I assume that there are other seemingly flippant instances of the exchange of initial consonants of words, but is there a general term for such a practice?
Edit: Please note, this refers specifically to (a) initial consonants only, and not to whole syllables, and (b) intentional, not accidental or ignorant, exchange of consonants.
Second edit: By popular (and quite reasonable) demand, I am emphasizing that, yes, these are spoonerims. So what I'm looking for is a name for the paricular activity of deliberately creating a spoonerism by changing only initial consonants or consonant groups, and changing only that.