The official bandwagon of swagger. A person or group is on the swag wagon when they have had a recent run of success and are increasingly confident because of it.
Gonzaga University's bench during a basketball game:
G.J. : "Bol is fired up, look at that celebration!"
Manny : "Of course, that's his 10th three-pointer tonight. He's definitely on the swag wagon."
The most bomb volvo 940 wagon ever driven. The owner of this car is obviously the most intelligent person on the face of the earth, she is also quite beautiful!
person 1: nice volvo 940 wagon!
person 2: its a swag wagon, you know it!
person 1: yeaaaaa