Also known as tachyphemia, cluttering is a speech disorder characterized by rapid or irrhythmic speech that is difficult for listeners to comprehend.
Example: The speech of a grade-school boy is hard to understand because some of the sounds he produces are oddly rushed or accented, though otherwise correct.
Grinnell, R. (2008). Cluttering. Psych Central. Retrieved on February 7, 2016, from http://psychcentral.com/encyclopedia/cluttering/