Saying you love or hate something to show off what a virtuous person you are, instead of actually trying to fix the problem.
> Jane: "Wow! I hate [Fox News]! They're so evil and they hate women!"
> John: "Why don't you actually do something instead of just [virtue signalling] about it?"
> Jane: "OMG that would be WAAAAAAY too much work" *goes back to [shitposting] on twitter*