I have no idea what a “SKUNC” is.
I linked to SKUNCs definition up in comment no.1. But here is the short reason for its invention.
Because RINO stands for Republican in name only, those who are in office can still claim to being republican even if they selectively cut our throats “for the common good in our opinion.”
So I held a contest to come up with an alternate, and the winner was GuyS who came up with SKUNC. That’s Statists knowingly undermining national charters.”
The American national charter is our constitution. But SKUNCs are all around the globe, most notably active in UK, Oz, NZ and and to a lesser extent today in Canada.