Xmarks is a community of kiltwearers and so MUGS aren't really an acceptable topic of discussion around here... some members even think modern kilts are pushing it!

With this in mind and in answer to your question, I think "kilted" would be preferable to "unbifurcated." Unicated is interesting but, as a neologism, might lack the necessary signification capacities.

I'm pretty sure the majority of the world's population currently wears p@nts or sh0rts, so kilting up is definitely not the norm. That doesn't, however, make the kilt "deviant." Highland attire is noble, or at least should be, if one respects it as a Scottish national symbol. You might get more currency rebelling in an Alt.Kilt with steampunk fittings...