New York, July 14 - If a new tape is to be believed, then Mel Gibson once called her ex Oksana Grigorieva a mentally deprived person whom he owns.

In the audiotape posted by RadarOnline.com, the "Mad Max" star is heard fighting with Grigorieva about money, pelting her with vicious insults, and using a racial slur in reference to the couple's nanny.

Gibson, whose net worth is estimated at more than 500 million dollars, goes ballistic at Grigorieva and hints at money problems.

"You're a f---ing mentally deprived idiot. You can't even f---ing figure it out, I'm paying the tax money instead of the credit card. Don't you get it?" the New York Daily News quoted him as saying. (ANI)