Goobersaurus Rex Share definition Flag The epitome of goober. Someone who is a total goober and can't hide their maximum Goober-ness. My girlfriend is a Goobersaurus Rex! She is just a giant goofball weirdo! Goobersaurus Rex by McGooberkins December 7, 2012 0 0 Get merch Get the Goobersaurus Rex mug. Buy Now — $32.95 See more merch