The Ramseys, OJ, and Gary Condit: One of us, one of us...gooble gobble, gooble gobble.
This an allusion to a classic and weird film called Freaks from 1932.
In a circus, a normal woman marrying a little man for his money. The freaks sing this to the woman, letting her know they accept her. In fact I think the guy who started the chant much later played "Master" in Mad Max: Beyond Thunderdome.