Depeche Mode's song, "I Promise You I Will," contains the following lines:
I'm sorry, but I'm just thinking of the right words to say
(I promise you)
I know they don't sound the way I planned them to be
The third line, I assume, is intentionally poorly-worded to exemplify the artist's failure to speak eloquently; his awkwardly-worded sentence obviously does not "sound the way [he] planned" it to sound.
For general English usage, is there a word that describes this type of literary device, in which a word or phrase is descriptive and/or exemplary of itself?
The closest term I can think of is onomatopoeia, but it only applies to individual words, not phrases, sentences, or even entire bodies of meta-writing.