Virtue signalling = going on really loudly about how much you hate something that's considered right-on to hate (eg UKIP, the Daily Mail) in order to tell the world how kind, compassionate and generally virtuous you are.
I see it all the time on MN. It's the moral equivalent of stealth boasting. Instead of saying 'Look at how much more kind and compassionate I am than most other people' virtue signallers claim really loudly to hate something 'bad', thereby hinting at their superior niceness rather than bragging about it out loud.
As well as being thoroughly in bad faith it creates a climate where sometimes quite difficult and nuanced issues can't be discussed, because any attempt to weigh different sides is drowned out by people using that issue to signal their own virtue.
I'm averagely right-on, averagely selfish/kind/whatever, generally fairly normal I suppose in my ethical views. But I find all this posturing hypocritical and very irritating. The internet seems to be making it worse. AIBU to wish it would stop?