clever piece of marketing by comcast. it highlights being on the phone, online, and watching tv simultaneously. in 2007, this approach targets the bottom of the market to go digital- dial-up is over for the rest of us.
This term is not to be confused with innovative langauage and terminology that originates from the people, this one arrived via commercial dissemination.
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?"