Rachael Ray denies accusations she attacked her mentor Oprah Winfrey with crude racial remarks, but Rachael's college boyfriend says she often turned abusive after drinking — and he believes she made the sickening slurs.

"She looks like a little angel, but the locker room talk that comes from her mouth could make a football player blush," her former beau Joseph Mills told The ENQUIRER in a bombshell exclusive interview.

"Rachael always felt superior to everyone else. She could be very belittling," charged Mills, who had an 18-month romance with the TV star beginning in 1987, when they were both students at New York's Pace University.

The controversy erupted after the Web site TMZ.com recently reported that Rachael, 38, made disparaging comments about Oprah while dining with seven others at a Houston's restaurant in the Century City Shopping Center in Los Angeles on Dec. 3, 2005. Rachael had been drinking red wine at the dinner, and a TMZ source said she had "a minimum of four big glasses." The star became "extremely loud and aggressive," and began dissing Oprah, sources told the Web site.

Pick up this week's issue of The ENQUIRER for all the details!