What a bunch of d-bags. That episode was just on Comedy Central five minutes ago. Ironically enough, I actually looked up the phrase after I heard Eric say it (for the 100th time) and I clicked on this link first. The way it goes is: Cartman said to Ms. Chokesondik "Ha ha, Charade you are", definitely in reference to Pink Floyd's song 'Pigs'.
It is interesting yes, and you guys have more than addressed the issue. But this thread is over a year long now. OK?

I also highly recommend you do listen to 'Pigs', which is the point of the original South Park reference. Its about the best Pink FLoyd there is.