a person who, in the course of seeming like a regular person, spams the shit out of you with social networking marketing shit, making you regret the day that you ever signed onto the internet, as you don't give a shit about whatever cause they're espousing.
"become a fan of xyz to reach 10,000 fans so i can show my boss that i am doing work instead of making my friends do it for me!" "omg i've been hotleaded."
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?"