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Penisaurus Erectis

A large penis that is big, erect, and terribly ugly
Jessica: "Carol,I was up early this morning and unfortunately saw Sam sneaking out of your bed with a penisaurus erectis. How can you use that thing, it is horrid!"

Carol: "I know, but once it's dark and I'm a little drunk, who cares?"
Penisaurus Erectis by Dastev April 13, 2009

Penisaurus rex 

A beast with the world's largest 5 inch penis. It should be noted that the 5 inches is in reference to the radius of the penis. When erect, it can extend up to 15 kilometers in length.

The word "Penis-" is the latin word for "Tail" and the term "rex" is also from the latin word "king". Hence "Penis King"

Kingdom - Anamalia
Phylum - Chordata
Class - Mammalia
Order - Penisauria
Family - Penisauridae
Genus - Penisaurus

Penisaurus rex is often abbreviated to P-Rex. The P-Rex is often synonymous with the word AVBP.

The most common prey for the Penisaurus rex is the Danfag

In some cultures, the P-Rex is referred to as "Moosa, the beast with the 2.5 ton AVBP". It sometimes suffers from back problems.
The Penisaurus rex used its AVBP to crush the Danfag

Johnny is the Penisaurus rex.

Occasionally, the Penisaurus rex would suffer from Penisclerosis and would get a 28 hour erection.

When the P-Rex caught a case of Penisclerosis, it used its AVBP to smack Danfags across the face.

People worship the Penisaurus rex by repeatedly chanting "Moosa-Bhai!! Moosa-Bhai!!"
Penisaurus rex by boringtimes February 1, 2010

PUBISAURUSREX

When there is so much pube hair that it takes over the persons privates. Also, its hard to see through it all and it attacks you like a dinosaur
Curbstomping Suzy had some much pubic hair that when her partner Seth Green went to give her oral sex, the PUBISAURUSREX came alive and attacked Seth. It resulted in Suzy never finding a partner again.

So shave your area and you won't turn out like Suzy.
PUBISAURUSREX by Nicoleeeeeeeee August 1, 2006

Penisaurus 

N. Penisaurus - Derives from the male organ Penis, suggesting that the intended victim is a large penis (Or the derogative alternative "Cock")
Dave, you are a penisaurus.
Penisaurus by Carl April 2, 2005

Penisaurus 

A penisaurus is a dinosaur that is shaped like a penis, has a big penis, and acts like a penis
"You are such a fucking penisaurus, eat my shit dog"
Penisaurus by NiggerGid January 19, 2018

Penisaurus Erectus

A very large erect penis, resembling that of a dinosaur.
"Wow babe, you made me so hard. Look its a Penisaurus Erectus."