Throw in some subtle nuance in the delivery, and I've done similar to basically call someone a jackass to their face.

For a rough example - attending a kids birthday party in the presence of racist ex-inlaws. Somebody says something predictably racist, I say something obnoxious which on the surface sounds like I might agree with them for half a second, then the realization hits that I was making fun of them and I roll my eyes and walk away.