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Paris Hilton—worst driver ever," Shahi wrote. "Almost hit me, then ran a stop sign. What if there was a kid around that corner, you dumb b-tch."

But wait, there's more.

"Paris Hilton—horrible excuse for a human being," Shahi went on to tweet. "What an irresponsible person…what a lame existence. I wouldn't be as pissed if I wasn't a mom."

Meanwhile, Hilton has yet to comment on Shahi's rant.

And she doesn't seem particularly fazed…

"What a beautiful day in LA today, I love this city," Hilton tweeted Friday.