“Two and a Half Men” alum Charlie Sheen apparently doesn’t think much of his replacement’s performance, tweeting that Ashton Kutcher should “quit barfing” on his old show.

The insults began Sunday, when Sheen declared former co-star Jon Cryer a genius and asked about his “lame” sidekick.

We’re guessing “Canon boy” is Kutcher, although Kutcher is the celebrity face of Nikon cameras, not Canon.

Sheen later clarified that he didn’t mean to call Kutcher lame, but rather “really lame.”

If Kutcher is aware of the tweets, he hasn’t bothered responding on Twitter. That’s probably a “winning” strategy.