something that is really creepy but also amazing. Can usually make people horny and gives guys a boner. Something really random, awkward and weird that you see at an unusual time.
Bill: What the fuck is that?
Jill: Its a chinese man with dredlocks wearing a purple wedding dress humping a stop sign while eating a burrito covered in tomatoe sauce
Bill: WHOA!!!!!!!!!CREEPALISHOUS!!!!!!!!
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?"