That Mel Gibson sure has a way with words. After all that hullaballoo, this supposed “Devout Catholic” has learned absolutely nothing from the disgusting anti-Semitic rant that made him the disgrace of Hollywood in 2006. We hear OctoMel has once again opened his flytrap to spew some horribly offensive rhetoric — this time while threatening to kill the mother of his child.

Why is this man allowed to walk our streets without medication?

Gibson, who is in the middle of a nasty custody battle with former girlfriend Oksana Grigorieva, was secretly taped ranting and raving by the Russian singer, who is trying to build a case against the lunatic in Family Court.

“You’re an embarrassment to me. You look like a fucking pig in heat, and if you get raped by a pack of n***ers, it will be your fault,” an erratic Gibson is heard fuming. “How dare you act like such a bitch when I have been so fucking nice. I am going to come and burn the fucking house down… but you will blow me first. Look what you did to me… look what you are… look what every part of you is… fucking fake… fucking fake. You are the most synthetic person… who the fuck are you?”

Mel is also accused of knocking two of Oksana’s teeth during an argument over their infant daughter, Lucia.

Grigorieva, 40, and Gibson, 54, have filed restraining orders against one another. They are due in court over the custody case later this month.