Top Definition
A cross between a monkey and a rhinoceros. Crazy like a monkey, stupid and unstable as a rhinoceros. Did you know its horn is made of compacted hair?

So far, there are only two in existence. THey are both homosexuals, so they cannot reproduce. That is why they are endangered.
Go away monkeynosaurus!

Stupid monkeynosaurus, go eat your own ****!

Go **** your monkeynosaurus friend, you monkeynosaurus!
by Monkeynosaurus Owner September 06, 2011

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