Chris Brown and CM Punk: Twitter Feud Alert

If you thought Tweeting birthday wishes to Rihanna was the most talked-about thing Chris Brown would do all day on social media, you thought wrong!

WWE heavyweight champion CM Punk and the hot-tempered R&B singer have been going at it on Twitter. It's safe to say you could call punk a "hater."

Punk randomly tweeted that he wants to "curb stomp" Brown at an upcoming WWE event, so Brown can "fight somebody that can defend themselves."

Brown caught wind of the tweet ... and decided to fire back.

He wrote: "@CMpunk needs more followers. Such a leader! Not to mention the roids hes on has made it utterly impossible for him pleasure a women."

Zing.

In his typical, sarcastic tone, Chris went on to add, "@CMpunk contact my assistant and I'll have em send u an autographed pic for my biggest FAN!!!"

Seriously, Chris, please put the phone down, man. Why do you think the "haters" won't let you move on? You're just making it worse on yourself. CHILL.

Chris' tweet about Punk's junk not working has obviously been removed. Something tells us Brown's mom is going to be far from pleased about this.

CM Punk, who has said that he's never taken drugs, has not responded to the steroid allegations or the implication that he can't please "a women."

Also no word on whether Chris accepts this fight invite: