Coming from "Food" and "Frustration" - When you're frustrated because someone ate junkfood near you and now you also want junkfood but can't eat any at the moment for whatever reason.
There was someone eating fries on the train when I was on my way to school. I still feel the foodstration from it!
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.