Being hurtfull or discriminatory to an obese person. Also only other fat people can tell other fat people that they are obese or chubby, just like black people being racist to other black people
John: Dude, fred just called you a tub-of-lard!
Michael: No man it's cool, he's fat like me, it wasn't obesist!
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?"