Chris Brown has decided to delete his Twitter account following a foul mouthed attack on comedy writer Jenny Johnson who challenged him over his 2009 assault of Rihanna.

Before the deletion Chris Brown appeared to confirm reports that he is once more dating Rihanna, tweeting: “Just ask Rihanna if she mad??????”

Jenny Johnson, who has nearly 300,000 Twitter followers, had challenged Chris Brown by telling him: “Being a worthless piece of s*** can really age a person.”

Her comment came in response to his tweet: “I look old as f***! I’m only 23…”

In response to Jenny Johnson’s tweet Chris Brown let rip in a foul mouthed attack: “Take them teeth out when u Sucking my d*** HOE.”

An unrepentant Jenny Johnston corrected Chris Brown’s spelling, saying: “It’s <<HO>> not <<HOE>> you ignorant f***.”

Chris Brown then lost his temper and amongst his abusive tweets told her: “mom says hello… She told me not to s**** in ur mouth, wanted me to s*** right on the retina.”

And: “I should fart while ur giving me top.”

Chris Brown has deleted his Twitter account following a foul mouthed attack on Jenny Johnson who challenged him over his assault of Rihanna

Jenny Johnson, who lives with her husband in Texas, replied: “Your mom must be so proud of you.”

And she then ended her side of the conversation, explaining: “Okay. I’m done. All I got from that exchange with Chris Brown is that he wants to s*** and fart on me.”

And she added: “I have zero respect for a person who seems unapologetic for the terrible crime he committed and shows no signs of changing.”

In 2009, Chris Brown hit, choked and bit Rihanna during an argument in Los Angeles.

He later pleaded guilty to assault. Since then, Chris Brown has worked to repair his image, undergoing violence counseling and putting out a new album.

Chris Brown has a duet with Rihanna on her recently released record, Unapologetic.

Rihanna has denied reports that they are dating, but on Saturday night tweeted a picture of a shirtless Chris Brown sprawled on her hotel bed.

She spent Thanksgiving at Chris Brown’s gig in Berlin, downing shots with him before heading back to his hotel.