The science of the cool folks, often refered to as "dudes". It includes the study of their free flowing nature, the various inflections used when pronouncing dude, and the survival skills of dudes on a limited budget.
"My interest in dudearonomy lead me to some of the coolest locations; skate parks, rock concerts, malls, and study hall....not!"
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.