Bragging out of self-confidence and not arrogance. When you boast about a certain accomplishment in your life or describe your strengths while having a conversation with someone, that person will admire your skills and point that they are impressed simply by saying or adding the word "brag swag" into their response.
Hana: I got an A on my exam!!
Thomas: Brag swag homie!!
Thomas: You're a poetical tyrant with a mad brag swag!
Hana: Preesh homie, preesh!
Hana: You must have a major brag swag to be able to pull that off...
Thomas: Well...I try. lol