Forget about mean girls.
On his Sirius Satellite radio show, the Foxxhole, on Sunday, the actor, 41, lashed out at the 16-year-old "Hannah Montana" star.
He went on a tirade after a caller mentioned how Cyrus pledged to "ruin" Radiohead after the rockers refused to meet her backstage at the Grammys.
"Who is Miley Cyrus?" Foxx asked. "The one with all the gums? She's got to get a gum transplant!"
But his insults -- many of which were too offensive to print -- didn't end there.
He also joked that Cyrus "make a sex tape and grow up. Get like Britney Spears and do some heroin. Do like Lindsay Lohan and get some crack in your pipe That's what I want."
A rep for Cyrus has yet to comment.