As of this moment (before clicking Publish), the Google finds nothing for kim kardashian "tractor trailer trash."
!!!MUST CREDIT BJKEEFE!!!
I don't actually have anything against KK, apart from the usual despair caused by anyone who's famous solely for being famous, but on the other hand, I really was stuck behind one of these big rigs for almost two hours this past Friday.
(pic. source: Pro Trucker)
And anyway, it's not even in the same league with whoever came up with my all-time favorite measure of insignificance: "one of the lesser Kardashians."
[Added] After looking around for a bit, the best bet seems to be The Colbert Report.