When you break the law and don't get caught, that's swag
When you could fuck your friendshot girlfriend but you choose not to, that's swag.
Swag is when you say you don't care what people think about you, and mean it
Swag is not only how you carry yourself, it is something that you are born with. you either have it or you don't, it cannot be taught or learned until you realized that it is all in your head.
SWAG
My swag readings are so high I can smell the vaginal secretions when i walk in a room.