Used to describe something that is so insanely mind blowing, you have to put multiple words together to create one grandeous word. Usually used when talking about intercourse or other various sexual acts.
Girl: "omg that was the best!!! Pretty much amaztasticlidiculous!"
Guy: "ya, that's what all the ladies say."
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.