Penisaurus Erectus Share definition Flag A very large erect penis, resembling that of a dinosaur. "Wow babe, you made me so hard. Look its a Penisaurus Erectus." Penisaurus Erectus by Boner Johnson December 2, 2007 0 0 Get merch Get the Penisaurus Erectus mug. Buy Now — $32.95 See more merch