I’ve been avoiding this one, simply because of how sad it is in the first place, but alas, here you go (from TMZ):

Oprah Winfrey’s former “Color Purple” co-star Rae Dawn Chong just UNLOADED on the talk show queen — claiming O is a self-centered fat “biotch” who would have been a “field n**ger” back in the slave days.

Rae Dawn — who’s part black — appeared on “Matty P’s Radio Happy Hour” and talked about how her personal relationship with O went from good to really REALLY bad back in the 80s (audio above).

RDC says Oprah was “lovely” to her back on the set of Purple in 1985 … but when Rae moved on to her next movie, “Commando,” that’s when she says O became “a total biotch.”

“I starred in Commando. And she just wasn’t having me. She’s competitive. She didn’t like me. She just wasn’t having me.”

It’s clear, Rae doesn’t like O either — ’cause for the next several minutes of the interview, she ranted on and on about how much she hates Winfrey — and stooped so low, she even took shots at her appearance and invoked slave imagery.

Following this, Rae Dawn Chong released a response video (to save face without apologizing, apparently), which you can check out below as well (courtesy of TMZ):

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