When someone tries to dodge every social event by delaying their decision until they run out of time and then they start whining and saying that they wanted to go, but due to some made-up circumstances weren't able to.
Anyone: How about going to the ZOO?
Hung: Yeah, great idea, let's go next month!
*a month later*
A: Ok, lets go
H: Oh no, I soooo wanted to go, but unfortunately... the dolphins got killed yesterday.
A: Ah, yea, that's such a hungsterthing from you.
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?"