A fork of Rural Dictionary
Refering to an enourmous penis.
Whoa! That guy has a penisaurous-rex.
a bulging bubbling penis longer than 8 inches or a dinosaur's erection.
"that collin has a penisaurous rex."
The dinosaur that all people love (especially girls that want to fuck with him) it is very recognized for his big, giant dick
Chris wants a Penisaurous-Rex for his birthday.