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Rapper Eminem is so busy going back and forth with singer Mariah Carey in their ongoing feud, that his other arch-nemesis, ex-wife Kim Mathers, was probably feeling neglected.

Not one to be ignored, Kim has spoken out in a new radio interview, claiming that her former husband was not exactly a sexual dynamo in bed.

Mathers dishes, “He’s not very well endowed. If you’re going to have sex with Marshall, make sure you have a little blue pill, because otherwise it does not work.” I wouldn’t bash him too much if I were her, considering she kept coming back for more tepid lovemaking.

But none of Mariah’s sharpest digs can even come close to Kim’s description of what she thinks of her former flame. “I vomit in my mouth whenever I’m around him or I hear his name,” Mathers asserts. She adds, “There’s nothing left in me for him. Nothing at all.”

I guess that means ixnay on any talk of a third marriage. Such a shame.

Gallery Info: Kim Mathers and her troubled past.