To have an experience so fantastical that the world seems an utterly cold and charmless place in comparison. As it would after waking from a dream where you witness the live birth of a unicorn.
Barnabus fell into a state of catatonic depression after Birthing the Unicorn at the Taylor Swift concert.
Someone who's outrageous swagger is so unreal and mind-blowingly amazing that he/she is named a Swag Master. However, since only one Swag Master of the Universe can exist, one's swag must be so intense and epic that people physically pass out from prolonged exposure to it. That is what constitutes a Swag Master of the Universe.
Some examples of past winners of the honorous title "Swag Master of the Universe" include interenet meme star Kamina with the epic cape and shades, and more recently Justin Bieber... LOL jk.