Chris Brown's abusive Twitter tirade

Chris Brown directed a tirade of abuse at a writer on Twitter. Photo/AP

Chris Brown has repeatedly called a woman a "ho" in a threatening and abusive tirade on Twitter.

The 23-year-old singer, who is still on probation for beating his then-girlfriend Rihanna in 2009, directed a string of abuse at comedy writer Jenny Johnson after she replied to one of his tweets by calling him a "worthless piece of s**t".

He responded with a tirade where he called her a "ho", a "pathetic b***ch" and threatened to "s**t" in her eye.

When she posted an article detailing the violent attack he inflicted on Rihanna, he replied: "See.. I don't even have to tell u what u already know. Thanks ho (sic)."

Brown deleted his tweets, but they are still recorded in the form of re-tweets on Johnson's Twitter account. Brown's Twitter account appears to no longer be active, although it's unclear whether it was taken offline by Twitter or by Brown.

Johnson finished her back-and-forth with the singer by saying: "Okay. I'm done. All I got from that exchange with Chris Brown is that he wants to s**t and fart on me."

She later posted: "I have zero respect for a person who seems unapologetic for the terrible crime he committed and shows no signs of changing."

In 2009, Brown assaulted Rihanna during an argument in Los Angeles.

He later pleaded guilty to assault.

Since then, Brown has worked to repair his image, undergoing violence counselling and putting out a new album.

Recent rumours say he has reunited with Rihanna, after the pair were spotted together during his tour in Europe recently.

He has a duet with the Barbadian popstar on her recently released record Unapologetic.