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.
We reached out to the woman and her family members several times for comment -- but got nothing ... except one family member told us he would not comment and hung up.