(adj.)
When you fight for a cause you don't understand, using facts you didn't check, defending values you don't actually believe in -- until someone disagrees, and suddenly they're racist, homophobic, or a nazi.
That libtarded policy of defunding the police while crime skyrockets is peak virtue-signalling gone wrong.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"