People that look harmless but are really aren't. Examples are individuals that carry concealable weapons/have dangerous connections/are streetsmart/sadistic in thought & action..etc. Also known as "traps" for the belligerently stupid, who are in turn called "trap-springers" in the midst of a glitterboy/glittergirl.
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.