Top Definition
Something that is super awesome; greater even than dragons.
Guy 1: Did you see that arnie film last night? He was fighting 10,000 ninja midgets riding velociraptors that have tommy guns for arms... on a space volcano that's about to erupt... using only a SHARK CANNON.

Guy 2: Dude, that's ninjasaurus.
by Squeeeak December 21, 2007

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