What is Cartman singing

Has anyone been able to make out what Cartman is singing at the end of "Merry christmas Charlie Manson". It sounds like he's making up his own words, but I cant hear what it is hes saying. It's been bugging be for a long time now.

I find that a bit annoying with cartman.. he says some sh*t funny stuff.. but it gets lost in the voice.. I mean sometimes it's easier to understand kenny.. :) Nathan