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Plebosaurus-Rex

These carnivorous creatures lack friends, and make themselves look really good because they also lack self-esteem. These creatures know that they are Plebs and thus they don't change. They feed on the penises of teachers, being massive arse-kissers. If they get detentions then their lives are over, then contemplate suicide.

Some Plebosaurus-Rexes do commit suicide and even the family members will dance on their overly-wide graves. Life is better this way as scientists like Steven Hawking know their threat on the popularity of others while P-Rexes are in a close proximity. Steven, and millions of others like me, want P-Rexes to be extinct from the planet as they are a large danger to humanity.
Chris: Lol, I just owned him on facebook! Look how popular I am, Imaginary Friend!
Spencer: Don't be a Plebosaurus-Rex, Chris!

Chris: Oh no! A detention! Why!! My life is RUINED!! I'm always licking Mr. Lavender's arse!
Lewis: You're such a Plebosaurus-Rex.
by LemonyStuff February 23, 2011
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peniosaurus rex

pen·io·saur (pen-nigh-o-s-argh'us, wre-cks-) A very large vagnivorous peninosaur of the Upper Crustaceous Period of North America, characterized by a small neck, large head and scaley skin. A vaginal intruder, the true king of the peniosaurs.
In a prehistoric times, it wasn't all that uncommon for a peniosaurus rex, to destroy a whole flock of ptwatodactyls.
by Mattie Macabre December 4, 2007
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Pregosaurus Rex

A pregnant woman who acts as if she is the first person to ever be pregnant. Quick to anger and quick to tears.
I'm going to work late rather than go home and face the wrath of Pregosaurus Rex.
by Coward in the corner August 10, 2010
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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.
by Carl April 2, 2005
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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"
by NiggerGid January 19, 2018
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Penisaurus Erectus

A very large erect penis, resembling that of a dinosaur.
"Wow babe, you made me so hard. Look its a Penisaurus Erectus."
by Boner Johnson December 2, 2007
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pianosaurus

a band that performed delightful music using simply toy instruments. alternative defn is the purple toy piano itself, the pianosaurus.
"hey bob, let's go see pianosaurus play tonight, right around the corner."
"honey, don't bang too hard on the keys or you'll break your pianosaurus."
by Regina February 17, 2004
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