A person claming to be superior to other people because he/she (generally male) has swag. It is a disease in which a person believes by listening to rap or pop music, cussing, mis-using the English language with words such as yo, yolo, swag, homies and various forms of text talk, have little respect for women, parents, and the elderly, and normally wearing flat billed "snapback" or regular flat billed hats, along with this they wear tennis shoes/sneakers, jeans generally with holes in them (and boxers or basketball shorts underneath visable) or just basketball/athletic shorts and they may or may not wear a t-shirt depending on the season. Occassionally they where a type of open-toed shoes called "slides" with long socks and basketball shorts. Some swagfags will "sag" their pants/shorts, there are some who do not however. Swagfags also tend to have an affection for phones, whore-like females with large breasts, butts, or both, and sports or working out.
Prime examples of swagfags in popular culture are: Justin Bieber (Most notable), all members of One Direction, most male Disney stars, practically all other "boy bands" or teen pop artists. And most rappers, Drake is significantly notable for his rise of the term "yolo".