Yeah - it's very similar, but it hasn't yet made it into the dictionary or spell-checkers. I think it's edging it's way there, and for our fandom, it's probably closer than the rest of the world, lol. Fandom-specific spelling!

I try not to use it too often myself, but it creeps in there - it's such a common term for Clark in the fandom! o.o Hard not to start using something everybody else does. I think I remember when I didn't like it either (makes Clark sound like a stupid rent boy or something) and then I got used to it, and then I started using it too. o.O I'll have to try and remember to keep the usage to a minimum! (After this story ;p)