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N. Penisaurus - Derives from the male organ Penis, suggesting that the intended victim is a large penis (Or the derogative alternative "Cock")
by Carl April 02, 2005
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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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Meaning a very largely,ungodly,inhumane oversized penis.
ohh myyy god! screamed the whore,your penisaurus is so huge, im gonna give you a freebee tonight
by Djay December 14, 2002
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dinasaur with a very large twanger
Hey look at the fuckin massive penisaurus's penis!!!

:: if it has short arms its a penisuarus rex !!!
by DEL BOI August 18, 2006
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Slang for penis, used by people who think there penis is larger than everyone else's
Who wants to pet my pet penisaur
by Jim May 24, 2004
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