"For Real" and "Are you serious?!" This word is for extreme situations in which the individual is is either extremely surprised or taken aback-in a positive or negativeway.
Ferserious is a two word add-on. The Fer is added to mean the following statement "you are more then fucking serious" so therefore would be FURSERIOUS, used instead of saying I'm Fucking Serious
Guy says, "Dude, I gotta confess, I slept with your wife on your honey moon." other guy says, "Are you furserious?!? I fucked your girlfriend Emily when you were in the Air Force."
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?"