Did Mel Gibson knock out two of his ex-lover's teeth in a fit of rage? That's the shocking allegation in a published report about the 54-year-old star.

Gibson's ex, Oksana Grigorieva, reportedly claims he punched her so hard during an argument, she lost two teeth and suffered a concussion.

But Gibson's lawyer calls Grigorieva "deceitful" and says she made up the incident.

Oksana, spotted shopping at a supermarket in Los Angeles over the weekend, also claims she's broke.

She told London's Daily Mail newspaper, "He is not paying me a penny. Nothing. I am having to live on credit cards and borrowed money."

Asked about the restraining order Gibson supposedly took out against her, she replied, "There isn't one."