Columbus Short threatened to kill Jamie Foxx ... according to a woman Short got pregnant.
Agostina Laneri got a restraining order against Short late last week, after claiming he was emotionally abusive to her and physically abusive to her kid.
She also claims in the docs, Short told her, "If I choose to kill one of these n****s ... I will do that. I'm that crazy n**** that will be on the news as the n**** that murked [murdered] Jamie Foxx." She says he then went on, "Y'all should be very afraid. Very afraid."
Laneri also claims Columbus hit her child, justifying it by saying the boy needed to learn.
She says he was definitely a threatening dude, once telling her, "Don't forget who I am. I have a knife."
Short has been ordered to stay 100 yards clear of her and her son.