Top definition
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 08, 2010
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The scariest creature known to man.
I saw this monsterlike creature roaming the plains at a buffet and it made me go blind. I think it was a pregosaurus rex.
by breakudown1011 July 10, 2008
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The vengeful act of crapping on a lover's chest while they sleep.

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