the complete combination of all of the following state of minds:
high
super high
super duper high
man i'm really high
dude i don't think i could be any higher man
stoned baked
blazed
fucked up
ripped blitzed
blown
toasted fried
gone
out of it
lit
faded
oh man
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?"