With the rise of TEA Party conservatives to the point of open disagreement with establishment Republicans a new lexicon is needed. It should reflect the opportunistic nature of the politician attempting to ride the coattails of TEA Party conservatism.
It should only be offensive enough to be distasteful yet represent an accurate description of the actions of the recipient.
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Some of the effort being put into destroying the utility of the word RINO is coming from Southerners who used to be Democrats who don't want us to remember that and turn on them.
They recall how quickly we walked away from Trent Lott and Newt Gingrich and that quite hapless Livingston guy in between Newt and Dennis.
They think the time for "testing" is over.