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Teairra Marí to Keri Hilson Hope You're Ready to Fight ... I'm Coming To Whoop Your Ass!!!

Teairra Marí says she's done with Keri Hilson's passive-aggressive attitude and wants to get fully aggressive -- as in serving Keri with a first-class butt kickin' for years of talking behind her back!!!

The R&Beef sizzled on Thursday when Teairra got wind of Keri's chat on Tank's podcast last month.

Keri recalled a time the Teairra was sitting in the front row at one of her concerts and was feeding her toxic "I-don't-wanna-be-here" energy while she was onstage.

The "Pretty Girl Rock" singer says it's important for artists to give one another love during performances, and Teairra was doing the complete opposite.

Teairra didn't take kindly to Keri's recollection of events, and then wrote a fiery threat in the "The Neighborhood Talk" comment section ... "Y'all, people gotta leave me alone. I don't bother anybody, just leave me the f*** alone.! so now, Keri! what's up you wanna fight or do you not want to fight because I'm gonna whoop your ass when I see you I'm sick of you people bothering me! You had a whole different story when I was in your face you're a liar bitch!!"

This battle probably won't be settled with the standard Verzuz setup. Teairra sounds like she wants to inflict pain on Keri by any means necessary!!!

Maybe Tank will referee the fight ... having instigated it and all.

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