Dyske, couldn't the original expression as well be "[Hope you] don't mind if I do."

Is it a new trend to eliminate punctuation, like what Dave suggests? For example BBC even has it like "2300" instead of 23:00 to indicate time. Was not it suppose to be helping readers to punctuate texts?

Language evolves, you know? I think one way of explaining/understanding the change in this case is to figure out what different sense would the same kids make when they use "by accident", if at all. Do they reject the "correct form?" Are they ignorant of the "correct" idiom? I think new usages do not necessary eliminate the old idioms but just add to the richness of language when accepted largely.

I just think (but not 253% sure) that the term Heather is looking for is infix and not tmesis.
Tmesis: i.e. "any more" (in oppose to anymore; without space) basically means to "cut" parts of a compound word. Another example is a term of Theater Anthropology: "in tension"
Whereas infix is to add another part in between the parts of compound word i.e. Anglo-Saxon (the O being the infix)
Am I right?

As xylo said it is called inversion and is rooted in Germanic languages. In today’s English it is used as an emphasis when one wants to be formal. In Danish for instance it is very common and you’d hear it a zillion times a day

I think the morning whisky had left a great "impact" on the dude the day he uttered that utter nonsense.
I just want to say that I believe one great advantage of English language is that almost always one can use a noun as a verb and vise versa. (I know that some would have objections.) But what could be cooler than—just as a familiar example—QT saying “don’t fuckin’ Jimmie me man!” I wonder if the professor would accept Jimmie as a noun!

Thanks Sarah, I did not know the other meaning of "yank." So it apparently pans with "yank" and "Yank." I'm sure of that because I checked the subtitle for “hard of hearing” and Yank was capitalized.
But I think the word "utility" refers to something more than being handy or any direct sense of the word. I guess it's some organization or maybe a brand or something having to do with Germans I suppose or something to that extent. I’m just guessing.

margaret, that was quite fun!

what is this video game? And how new? I heared this V-card last September.

I just found this: http://www.englishpage.com/verbpage/pastperfect.html