Sự nói ngọng, sự nói nhịu ( (thường) là hài hước)

=====Sự nói lái Vd: conquering kings, nói lái thành ra kingkering congs

N.

A transposition, usu. accidental, of the initial lettersetc. of two or more words, e.g. you have hissed the mysterylectures. [Revd W. A. Spooner, English scholar d. 1930,reputed to make such errors in speaking]