The 54-year-old star can be heard unleashing a profanity-laced tirade over how Grigorieva dresses and using derogatory phrases, in the recording posted by Radar Online.
"You go around sashaying in your tight clothes. I won't stand for that anymore," Gibson allegedly says in the tape.
"I'm just telling you the truth. I don't like it. I don't believe you anymore. I don't trust you. I don’t love you. OK? I will take care of my child but I don't want you anymore," he says.
Gibson is being investigated after the Russian beauty alleged in a restraining order filed June 25 that the 54-year-old actor punched her in the face "more than once" on that day, causing a broken tooth, knocking out a veneer and causing a concussion.