Top definition
The friendly breed of dinosaur that leaves children presents on Christmas Eve, but only the believers. He is an elusive creature and can sometimes be found lurking in the woods trying to find Jesus.
Me: Hey Rachel! Do you believe in Santasaurus?

Rachel: No you dumb cow!

Me: Every time you say, "I don't believe in Santasaurus," a redneck pops a cap in its ass!
by hobosd January 13, 2009
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