I like many of the chants suggested, but probably most favor the 3-second count. This does have the ability of getting into people's heads -- players and refs.
I know this thread is in fun, but after the Jason Kidd wifebeater chant I know nothing is off-limits for some C's fans. I wouldn't participate in a chant that either insults someone's looks (Llama, Ugly Sister), insults someone's relative (Ugly Sister), or could be painful for a player's children to hear (Wifebeater, No Means No).