Top Definition
When a pregnant women goes all hormonal and acts like a raging, lumbering dinosaur.
"Hey Ted, how's your wife doing with the pregnancy?"

"She was fine up until her 2nd trimester...now she's a total pregnasauraus; she won't even let me sleep with her at night!"
by chupathingy193 July 18, 2009
5 Words related to pregnasauraus

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