An act of trickery performed for the sole purpose of being a dick.
I stopped at a gas station to ask the way to the hospital. I followed the directions given to me by a friendly stranger whose malicious tradickery sent me in the wrong direction for no apparent reason, and resulted in being late for my oncology appointment.
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.