Anyone who is into fashion or Sex and the City knows about the time when Carrie fell flat on her face in the middle of the runway during the fashion show. So that's what it is its when you fall in the middle of the runway during a fashion show.
OMG-did u see her fall? She's massive fashion road kill.
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?"