I noticed this word being used at theregister.co.uk . I'm pretty sure it's another way of saying script kid, maybe it's a bit more derogatory.
"...the emergence of AirSnort, and soon another similar tool called WEPcrack (which is still in development), are certain to deskill the process of breaking into wireless networks and in so doing open them up to s'kiddiots everywhere." - theregister.co.uk
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?"