A girl I used to work with at SilverCity whose ass was so big we called her couch ass, or sofa ass. Ahe had an ass you could sit on. We could never get by her at the candy bar, and always had to go all the way around the other way because her couch ass took up the entire aisle.
Couch ass was stocking the fridges with Gatorade, and I nearly sat on her, pulled her arm, and reclined on her like a La-Z-Boy.
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?"