New Zealand/Australian term. Past tense of shout. Meaning to have bought something for someone else with no gain to oneself (expect the expectation that they'll do the same for you sometime in the future).
I went out on the town with my friend Dave. He had no money so I shouted him a few beers.
or
I shouted a keg to celebrate my promotion and invited all my friends.
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.