A person whose gender is hard or impossible to determine based upon their clothing, hairstyle, physical appearance, or mannerisms. Prevalent to the emo culture, common to suburbs and posh places in cities.
"Was that a dude or a chick?"
"I really don't know, it was definately an ambigenderious emo kid"
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?"