CHRIS BROWN GETS CUSSED OUT FOR BEATING RIHANNA!

Chris Brown was the target of a nasty verbal attack last night -- as one outspoken woman unleashed a profanity-laced assault right in the singer's face.

It all went down as the convicted felon posed with fans at Footaction in NY last night -- when out of nowhere one woman in the crowd got close to him and began shouting, "f**king beater" and "I hope someone beats the f**king crap out of you!"

Chris smiled and walked right past the screaming woman -- but Brown's devoted fans defended his honor by shouting, "Smack that bitch up."