Swagnacious is the ultimate word used only by people who are brave enough to use it. It is the next level up from the common term used 'swag'. This word cant be reached by basic, boring people. It is used to describe something so utterly amazing and cool which the word 'swag' would just not justify.
Speaker 1: Oh look at Aimee and Katie they are so Swagnacious!
Speaker 2: I know! They are amazing.
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.