Swagasaurus-Rex Share definition Flag (Swag-uh-sohr-us-rehcks) n. 1. A person who contains and unfathomably large amount of Swag. "DUDE! That person is such a Swagasaurus-Rex. I can't fathom how much Swag they have!" Swagasaurus-Rex by Spartan'Abs October 18, 2010 0 0 Get merch Get the Swagasaurus-Rex mug. Buy Now — $32.95 See more merch