Charlie Sheen to Kim K ... 'Go F Yourself' ... and Your Ass is 'Gross' and 'Giggly'

Charlie Sheen went on a wild rant against Kim Kardashian in the wee hours Tuesday morning, telling her to go "f yourself" for allegedly crushing a little girl's dream.

Charlie says a friend told him about a 6-year-old girl who worshiped Kim and asked her for her autograph. Charlie says Kim turned the kid down flat, adding, "She cries about it every night before she goes to sleep."

And that's when he goes off: "you are lucky that ANYONE cares about your gross and giggly [sic] bag of funk you dare call an ass."

He dares her to compare resumes with him, and then says, "your public loves u. give something back or go f yourself."

His parting shot, "My apologies to your hubby, great guy I'm sure, I hope his vision returns one day."

He signs it "c." Not even a "sincerely."

Sheen deleted the post a short while later.

11:30 AM PT -- Charlie has now apologized.