My wife's (very scholarly) Forbes Library book club is reading Jonathan Lethem's Motherless Brooklyn this month. The book seems to be full of wonderfully inventive swearing. Last night, my wife read this one aloud to me (p. 170):
If I wanted a gun, I'd get a gun, you diphthong.
Diphthong works remarkably well as a pejorative. Curious about whether this was Lethem's innovation, I searched the Net for "you diphthong", figuring that the initial pronoun would cut down on merely phonological discussions. Precision was still poor — a mixture of phonological discussions of you and fortuitous juxtapositions of these two words by programs for generating random text, but the search did turn up a few cases of genuine expressivity, and I discovered that the Urban Dictionary has an entry:
1. diphthong: A vowel combination consisting of a weak vowel and a strong one. It is more commonly used as an insult, seeing as it is a legitimately funny word.
There is a diphthong in "loud."
YOU'RE A DIPHTHONG.
More commonly? I think not in general, but perhaps in some spheres. In any event, when I next bumble something, I'm going to try a self-directed Chris, you diphthong! to see if that does the trick.