Penissaurusrex Share definition Flag A mature sexist man who believes he's still attractive to women usually over 45 with a tiny cock and useless hands See that old guy over there drinking halfs and staring at the barmaids tits he's a penissaurusrex Penissaurusrex by Kali_mist November 4, 2016 0 0 Get merch Get the Penissaurusrex mug. Buy Now — $32.95 See more merch