The singer/actor took to his weekly radio show "The Foxxhole" over the weekend to slam Cyrus over her recent feud with rockers Radiohead.
Cyrus had vowed to "ruin" the British group last month after frontman Thom Yorke snubbed her at the Grammy Awards in February.
And Foxx has angrily hit out at the Disney sensation for making the comments -- telling the 16-year-old Hannah Montana actress to get a gum transplant, adding: "Do some heroin... get some crack in your pipe."
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