Florida State Bar Fight -- She Called Me The N-Word ... QB Claims

Florida State QB De'Andre Johnson claims the woman he struck in a Tallahassee bar fight called him the N-word before things got violent ... this according to Johnson's rep.

We're told ... Johnson is adamant the woman dropped the N-bomb when Johnson initially bumped into her at the bar ... saying, "Get off me you f**king n**ger."

Johnson's rep says there are witnesses at the bar who also claim they heard the racial slur ... and they're willing to testify in court.

As we previously reported, Johnson says he's "extremely embarrassed" about the situation and has apologized for punching the woman in the face ... while maintaining that SHE was the initial aggressor.