Breaking NewsWell that was fast ... Charlie Sheen is threatening to destroy Ashton Kutcher -- just hours after making peace with his "Two and a Half Men" replacement.
As we reported ... Kutcher called out Charlie on "Jimmy Kimmel Live" Thursday night for belittling him on Twitter, telling him to "shut the f**k up." Sheen got the point, and made a public apology.
But Sheen tells us ... when he did his mea culpa he hadn't watched the Kimmel interview. When Charlie got around to watching it he immediately blasted Kutcher, tweeting, "Dood, you ever tell me to shut the F*** up, EVER again, and I'll put you on a hospital food diet for a year."
Charlie tells TMZ he has a warning for Ashton ... "Mind your tongue, junior."